Mobile applications have become a major part of everyday digital services. Banking, healthcare, shopping, communication, payments, identity verification, and enterprise operations now depend heavily on mobile apps. As a result, attackers increasingly target mobile applications and the APIs behind them.
The OWASP Mobile Top 10 provides a practical way to understand some of the most important security risks affecting mobile applications. The latest OWASP Mobile Top 10 was released in 2024 and includes risks covering credentials, software supply chains, authentication, input validation, communication, privacy, binary protection, configuration, data storage, and cryptography.
The list is useful for developers, penetration testers, application security teams, and organizations building mobile applications. It should not, however, be treated as a complete mobile security checklist. OWASP itself describes the Mobile Top 10 as a starting point for understanding important mobile risks rather than a complete list of every possible vulnerability.
In this guide, we will break down all ten risks, explain how they appear in real applications, and discuss practical ways to test and prevent them.
What Is the OWASP Mobile Top 10?
The OWASP Mobile Top 10 is a list of significant security risks affecting mobile applications.
The current 2024 list contains:
- M1: Improper Credential Usage
- M2: Inadequate Supply Chain Security
- M3: Insecure Authentication/Authorization
- M4: Insufficient Input/Output Validation
- M5: Insecure Communication
- M6: Inadequate Privacy Controls
- M7: Insufficient Binary Protections
- M8: Security Misconfiguration
- M9: Insecure Data Storage
- M10: Insufficient Cryptography
OWASP’s 2024 release also shows how the list changed from the older 2016 version, reflecting changes in mobile application architectures and attack patterns.
This is important because mobile security has changed considerably. Modern apps depend heavily on cloud APIs, third-party SDKs, authentication platforms, analytics services, payment providers, and cross-platform frameworks.
Why Is the OWASP Mobile Top 10 Important?
Mobile applications often process information that attackers can monetize or abuse.
Examples include:
- Login credentials
- Authentication tokens
- Financial information
- Personal information
- Health information
- Location data
- Private messages
- API credentials
- Business information
A vulnerability may exist inside the mobile client, the backend API, a third-party dependency, or the interaction between these components.
For example, an application may securely encrypt local data but still expose another user’s account through a broken API authorization check.
This is why mobile security requires more than checking the application’s source code.
The OWASP Mobile Top 10 gives teams a common vocabulary for discussing these risks.
For organizations that need broader application security assessments, “https://pentesthint.com/” PentestHint can also be used as a resource for “https://pentesthint.com/” VAPT services and security-focused information.
OWASP Mobile Top 10 2024 Explained
M1: Improper Credential Usage
Credentials are among the most valuable assets attackers can obtain from a mobile application.
Improper credential usage occurs when an application handles credentials incorrectly.
Examples include:
- Hardcoded passwords
- Hardcoded API secrets
- Embedded private keys
- Weak credential storage
- Credentials included in logs
- Long-lived authentication secrets
- Reusing credentials across environments
- Storing credentials in insecure locations
A common example is an application containing a backend password inside its compiled code.
Even if the application is distributed through an official app store, a determined researcher may be able to inspect the application package and discover embedded secrets.
Real-World Example
Imagine a mobile application that communicates with an internal service using a username and password embedded in the binary.
An attacker extracts those credentials and discovers that they provide access to an internal API.
The problem is not simply that the binary can be reverse engineered. The larger issue is that the credential was trusted as a secret even though it was distributed to every application user.
Prevention
Developers should:
- Avoid hardcoding secrets in applications
- Keep privileged credentials on trusted backend systems
- Use platform-provided secure storage where appropriate
- Rotate exposed credentials
- Apply least privilege
- Separate development, testing, and production credentials
M2: Inadequate Supply Chain Security
Modern mobile applications rarely consist entirely of code written by the application’s development team.
They often use third-party:
- SDKs
- Libraries
- Frameworks
- Analytics platforms
- Payment components
- Authentication providers
- Crash reporting tools
- Advertising SDKs
A vulnerable or malicious dependency can introduce security problems into an otherwise well-designed application.
OWASP’s current MASVS also recognizes the importance of third-party components and notes that modern applications can depend heavily on external software.
Real-World Example
Suppose a mobile application uses an outdated third-party networking library containing a known vulnerability.
The development team may have secure application code, but the vulnerable component still becomes part of the final application.
Prevention
Organizations should maintain an inventory of dependencies and:
- Track SDK versions
- Remove unused libraries
- Monitor vulnerability disclosures
- Update dependencies regularly
- Review third-party permissions
- Assess vendor security
- Maintain a software bill of materials where appropriate
The current OWASP MASVS supports CycloneDX, making mobile software component information easier to integrate into security and development workflows.
M3: Insecure Authentication/Authorization
Authentication determines whether a user is who they claim to be.
Authorization determines what that authenticated user can access.
A mobile application can implement authentication correctly and still have serious authorization problems.
Common weaknesses include:
- Weak password policies
- Poor session management
- Insecure password recovery
- Missing MFA for sensitive operations
- Token reuse
- Broken role enforcement
- Insecure local authentication
- Missing server-side authorization
OWASP’s MASVS specifically states that authentication and authorization enforcement must ultimately occur at the remote endpoint when a mobile app communicates with a backend service.
Real-World Example
Consider an API request such as:
GET /api/account/1024
If a logged-in user can change 1024 to 1025 and receive another customer’s account information, the backend has failed to enforce object-level authorization.
The mobile interface might look completely secure, but the API remains vulnerable.
Prevention
Developers should:
- Enforce authorization server-side
- Use short-lived access tokens where appropriate
- Protect sensitive operations with additional authentication
- Secure password recovery
- Implement proper session invalidation
- Avoid trusting client-side authorization decisions
M4: Insufficient Input/Output Validation
Mobile applications process large amounts of input.
Input can originate from:
- Users
- APIs
- Deep links
- QR codes
- Files
- WebViews
- Push notifications
- Bluetooth devices
- Other applications
If input is not validated properly, attackers may manipulate application behavior.
Output also requires careful handling. Data returned from an API should not automatically be considered safe.
Real-World Example
An application accepts a product identifier from a deep link:
shop://product?id=100
If the application blindly processes the parameter, unexpected values may trigger crashes, unauthorized actions, or other security issues.
Similarly, an application that renders server-controlled HTML inside a WebView without appropriate controls may introduce script execution risks.
Prevention
Use:
- Strict input validation
- Allowlist-based validation where appropriate
- Context-aware output encoding
- Safe parsing
- Length restrictions
- Type validation
- Server-side validation
- Secure handling of URLs and files
Never assume that data is trustworthy simply because it originated from the application’s own interface.
M5: Insecure Communication
Mobile applications constantly communicate with remote services.
That communication may contain:
- Credentials
- Session tokens
- Personal data
- Payment information
- API requests
- Application data
If communication is not properly protected, attackers may be able to intercept or manipulate sensitive information.
Potential problems include:
- Plain HTTP
- Weak TLS configuration
- Improper certificate validation
- Trusting invalid certificates
- Sensitive information transmitted unnecessarily
- Misconfigured network security controls
Apple’s App Transport Security provides important protections for network communication, but developers should still review their application’s networking behavior rather than assuming the platform solves every problem.
Prevention
Use:
- HTTPS
- Modern TLS configurations
- Proper certificate and hostname validation
- Secure authentication protocols
- Appropriate platform networking APIs
- Minimal transmission of sensitive information
Network security should be tested during both static and dynamic assessments.
M6: Inadequate Privacy Controls
Mobile applications can access highly sensitive information through device permissions and application functionality.
Examples include:
- Location
- Contacts
- Photos
- Microphone
- Camera
- Health information
- Device identifiers
Privacy problems occur when applications collect, expose, retain, or process personal information without adequate controls or transparency.
OWASP introduced dedicated privacy controls into MASVS to provide a baseline for privacy-related mobile application security. The controls address areas such as minimizing access to sensitive data, preventing unnecessary identification, transparency, and user control.
Real-World Example
A flashlight application that requests access to contacts and precise location creates a privacy concern even if the application does not contain a traditional software vulnerability.
The key question is whether the requested access is necessary and appropriately handled.
Prevention
Developers should:
- Request only necessary permissions
- Minimize personal data collection
- Protect collected information
- Clearly explain data usage
- Delete unnecessary data
- Give users appropriate control over their information
Privacy should be considered during application design rather than added after development.
M7: Insufficient Binary Protections
Mobile applications can be reverse engineered.
Attackers may analyze application binaries to understand:
- Application logic
- API endpoints
- Security controls
- Secrets
- Cryptographic operations
- Licensing mechanisms
- Proprietary algorithms
Binary protections aim to make unauthorized analysis and tampering more difficult.
These protections can include:
- Code obfuscation
- Anti-tampering mechanisms
- Debugger detection
- Runtime integrity checks
- Jailbreak or root detection
- Anti-hooking mechanisms
However, these controls should be considered defense in depth.
They should never replace server-side authentication or authorization.
OWASP’s MASVS includes a dedicated resilience category covering resistance to reverse engineering and tampering.
M8: Security Misconfiguration
Security misconfiguration occurs when security settings are incorrectly implemented or unnecessarily permissive.
Examples include:
- Debug functionality enabled in production
- Excessive permissions
- Weak network settings
- Unnecessary exported components
- Verbose error messages
- Insecure application configuration
- Test endpoints exposed in production
- Excessive logging
Configuration problems can be particularly dangerous because they are sometimes introduced during development and remain unnoticed until deployment.
Real-World Example
A production application may accidentally contain a development API endpoint.
If that endpoint exposes test functionality or weaker authentication, attackers may use it as an alternative route into the system.
Prevention
Teams should:
- Review production configurations
- Remove debug features
- Disable unused functionality
- Apply least privilege
- Separate development and production environments
- Perform configuration reviews before release
- Automate security checks where practical
M9: Insecure Data Storage
Mobile applications frequently store data locally to improve performance and usability.
Potential storage locations include:
- SQLite databases
- Property lists
- Preferences
- Cache files
- Temporary files
- Logs
- Application documents
- Keychain
The problem occurs when sensitive information is stored without adequate protection.
Examples include:
- Plaintext passwords
- Authentication tokens
- Personal information
- Financial data
- API keys
- Private messages
For sensitive credentials, developers should use appropriate platform security mechanisms instead of treating ordinary application storage as a secure vault.
Real-World Example
A banking application may properly protect its main database but write authentication tokens into a plaintext debug log.
An attacker who gains access to the application’s stored data could potentially recover those tokens.
Prevention
Teams should:
- Minimize local storage
- Avoid storing unnecessary sensitive information
- Use secure platform storage
- Protect sensitive databases
- Remove sensitive logs
- Define appropriate data retention periods
- Test application caches and temporary files
M10: Insufficient Cryptography
Cryptography protects information when implemented correctly.
But simply using encryption does not guarantee security.
Common cryptographic weaknesses include:
- Weak algorithms
- Hardcoded encryption keys
- Poor key management
- Predictable random values
- Reused initialization vectors
- Insecure hashing
- Custom cryptographic algorithms
- Poor key storage
A particularly dangerous design is storing the encryption key directly beside the encrypted data.
Encryption then provides little meaningful protection if an attacker can easily obtain both.
Prevention
Developers should:
- Use established cryptographic libraries
- Prefer platform security APIs
- Use modern algorithms
- Protect cryptographic keys separately from encrypted data
- Use secure random number generation
- Avoid designing custom cryptographic algorithms
- Establish proper key rotation and lifecycle processes
Cryptography should solve a clearly defined security requirement rather than being added simply because an application is expected to “use encryption.”
How to Test the OWASP Mobile Top 10
A professional mobile security assessment should combine static analysis, dynamic analysis, API testing, and manual review.
A typical workflow includes:
Static Analysis
Inspect:
- Application packages
- Configuration files
- Entitlements
- Dependencies
- Binary strings
- Embedded credentials
- Frameworks
- Cryptographic implementations
Dynamic Analysis
Observe the application while it runs.
Test:
- Authentication
- Authorization
- Local storage
- Network communication
- WebViews
- Deep links
- Runtime behavior
- Error handling
API Testing
Because many mobile applications depend heavily on backend services, API security should be tested separately.
Review:
- Access control
- Authentication
- Input validation
- Rate limiting
- Sensitive data exposure
- Business logic
- Session handling
OWASP notes that MASVS focuses on the mobile application itself and that associated remote endpoints should be assessed using appropriate server-side standards such as the OWASP ASVS.
OWASP Mobile Top 10 Testing Tools
Security professionals can use a combination of commercial and open-source tools.
Common choices include:
- MobSF
- Burp Suite
- Frida
- Objection
- Ghidra
- Hopper
- Xcode
- LLDB
- Wireshark
- SQLite analysis tools
- Platform-specific command-line utilities
Each tool has a different purpose.
For example, a static analysis platform may quickly identify suspicious configuration or code patterns, while an intercepting proxy can help analyze API requests during an authorized assessment.
Runtime instrumentation tools are useful when a tester needs to understand how an application behaves while it executes.
Automation is helpful, but it should not replace manual testing. OWASP’s assessment guidance specifically warns against relying solely on automated security tool output and recommends maintaining evidence that security controls were actually tested.
For practical experience, “https://vuln.pentesthint.com/” hands-on labs can help security learners build familiarity with vulnerable applications and realistic testing workflows.
OWASP Mobile Top 10 vs OWASP MASVS
These two OWASP resources serve different purposes.
The Mobile Top 10 is primarily an awareness and risk-focused list. It helps teams understand important mobile application risks.
The MASVS is a security verification standard containing defined security controls.
The current MASVS includes control groups for:
- Storage
- Cryptography
- Authentication
- Network communication
- Platform interaction
- Code quality
- Resilience
- Privacy
OWASP also provides the MASTG, which contains technical testing guidance for verifying mobile security controls.
A useful way to think about the three resources is:
Mobile Top 10 → What risks should we understand?
MASVS → What security controls should the application meet?
MASTG → How can we test those controls?
This makes the three resources complementary rather than competing standards.
OWASP Mobile Top 10 Security Checklist
Before releasing a mobile application, teams should review at least these areas:
- Credentials are not hardcoded into the application
- Third-party dependencies are tracked and updated
- Authentication is implemented securely
- Authorization is enforced server-side
- Input and output are validated
- Network communication uses appropriate encryption
- Privacy permissions are minimized
- Binary protections are appropriate for the application’s risk
- Production configuration is securely hardened
- Sensitive data is stored securely
- Cryptographic operations use approved, modern approaches
- Debug features are removed from production
- Sensitive logs are avoided
- API security has been independently tested
- Security testing is performed before release
Best Practices for Developers
Mobile security should not be treated as a final penetration-testing exercise.
Developers can reduce risk by integrating security into the entire software development lifecycle.
Start security requirements during architecture and design.
Perform threat modeling before implementation.
Use secure coding standards during development.
Scan dependencies continuously.
Perform static analysis during builds.
Run dynamic security tests against staging environments.
Test APIs separately.
Review privacy requirements.
Keep security controls aligned with the application’s actual risk.
The OWASP MASVS is designed to support security throughout development and testing, and OWASP emphasizes that it complements secure development practices rather than replacing them.
Organizations looking to develop practical security skills can also explore “https://academy.pentesthint.com/” cyber security training focused on application security, penetration testing, and vulnerability assessment.
Common Mistakes When Using the Mobile Top 10
The Mobile Top 10 is useful, but teams sometimes misunderstand how to use it.
Treating the Top 10 as a Complete Checklist
The list highlights major risks but does not represent every mobile security problem.
OWASP itself states that mobile risks extend beyond the Top 10.
Testing Only the Mobile Client
A secure mobile client cannot compensate for a vulnerable backend.
Always consider APIs and supporting services within the authorized scope.
Relying Only on Automated Scanners
Automated tools can identify potential issues, but they may not understand application-specific business logic.
Manual testing remains important.
Focusing Only on Technical Vulnerabilities
Privacy, data minimization, dependency management, and secure configuration are also important parts of mobile security.
Ignoring Third-Party Components
A vulnerability inside an SDK can affect the final application even when the application’s own code is secure.
Career Opportunities in Mobile Application Security
Mobile security is a valuable specialization for penetration testers and application security professionals.
Professionals familiar with the OWASP Mobile Top 10 can pursue roles such as:
- Mobile Application Security Tester
- Mobile Penetration Tester
- Application Security Engineer
- iOS Security Researcher
- Android Security Researcher
- Product Security Engineer
- VAPT Consultant
- Security Consultant
- Mobile Security Analyst
A strong foundation in web security and APIs is especially useful because mobile applications increasingly act as clients for cloud-based services.
Understanding authentication, authorization, HTTP, cryptography, reverse engineering, operating systems, and secure coding can significantly improve a mobile tester’s effectiveness.
Future of Mobile Application Security
Mobile applications are becoming more connected and complex.
Modern apps can interact with:
- Cloud platforms
- AI services
- Payment providers
- IoT devices
- Wearables
- Vehicle systems
- Enterprise APIs
- Third-party SDKs
Cross-platform development also introduces additional layers that security teams need to understand. OWASP’s MASVS is designed to apply across native, cross-platform, and hybrid mobile applications, while still recognizing that specific frameworks can introduce platform-specific risks.
Software supply chains and privacy will remain particularly important as applications depend on more external services and collect more user information.
Mobile security testing will therefore increasingly require an ecosystem-wide view instead of focusing only on the application package installed on a phone.
Conclusion
The OWASP Mobile Top 10 provides a practical starting point for understanding the security risks that affect modern mobile applications.
The 2024 list covers ten important areas, from improper credential usage and insecure authentication to supply chain security, privacy, data storage, communication, configuration, and cryptography.
For developers, the list helps identify security requirements early in the development lifecycle. For penetration testers, it provides a useful structure for organizing mobile application assessments.
However, the Mobile Top 10 should not be used in isolation.
Teams should combine it with the OWASP MASVS for security requirements and the MASTG for technical testing procedures. OWASP describes these resources as complementary parts of its mobile application security project.
The most effective mobile security programs combine secure development, dependency management, privacy controls, API security, manual penetration testing, automated analysis, and continuous monitoring.
For organizations looking to improve their application security posture, PentestHint can be a useful starting point for “https://pentesthint.com/” security consulting, VAPT, and practical cybersecurity resources.
FAQ
What is the OWASP Mobile Top 10?
The OWASP Mobile Top 10 is a list of major security risks affecting mobile applications. The latest 2024 version contains ten categories covering credentials, supply chain security, authentication, validation, communication, privacy, binary protection, configuration, storage, and cryptography.
What is the latest OWASP Mobile Top 10 version?
The latest OWASP Mobile Top 10 is the 2024 edition. OWASP’s Developer Guide notes that the project was first released in 2014, updated in 2016, and most recently released in 2024.
Is OWASP Mobile Top 10 the same as OWASP MASVS?
No. The Mobile Top 10 is primarily an awareness and risk list, while MASVS provides defined security verification controls for mobile applications. MASTG provides technical testing guidance for those controls.
What is the most important OWASP Mobile Top 10 risk?
There is no universally most dangerous category. Risk depends on the application and its threat model. For a banking application, authentication, authorization, credentials, communication, and cryptography may be particularly important. For another application, privacy or supply chain risks may have greater impact.
Can automated tools detect all OWASP Mobile Top 10 vulnerabilities?
No. Automated tools are useful for identifying potential issues, but they cannot reliably discover every business logic, authorization, privacy, or application-specific vulnerability. Manual testing is still required for a thorough assessment.
Does the OWASP Mobile Top 10 apply to both Android and iOS?
Yes. The OWASP Mobile Application Security project is designed for mobile applications across platforms, including native and cross-platform applications. Platform-specific testing techniques can differ, but the underlying security principles apply broadly.
Should APIs be tested during a mobile application penetration test?
Yes, when the APIs are within the authorized scope. Mobile applications commonly depend on backend services, and vulnerabilities such as broken authorization can exist entirely on the server side. OWASP recommends evaluating remote endpoints against appropriate server-side standards such as ASVS.
How can I learn OWASP mobile security testing?
Start with the OWASP Mobile Top 10 to understand common risks, then study MASVS for security controls and MASTG for practical testing methods. Combining documentation with “https://vuln.pentesthint.com/” cyber security labs and authorized practice environments is an effective way to develop hands-on skills.
Suggested Tags
OWASP Mobile Top 10, Mobile Application Security, Mobile Security, Mobile Penetration Testing, OWASP MASVS, OWASP MASTG, Android Security, iOS Security, Mobile App Pentesting, API Security, Application Security, VAPT, Cyber Security
