Error Message Vulnerabilities

Why You Should Care About Information Exposure

Ever get one of those annoying error messages on your phone that gives way too much detail? You know, the ones that tell you the line of code that failed or the exact database query that crashed the app. As an app user, you may dismiss the message and move on. But did you know those overly verbose error messages could be exposing your personal data?

How Error Messages Lead to Information Exposure

Error messages are an inevitable part of any software. While they aim to provide users with feedback to resolve issues, they often expose sensitive data. This unintended information exposure compromises user Privacy and Security.

Why Error Messages Lead to Data Leaks

Error messages usually contain technical details to help developers debug issues. However, they also display application data, database names, table structures, and more. Hackers can exploit these details to launch attacks.

For example, an error message may reveal:

The type of database used (MySQL, PostgreSQL)

The version number of the database or application

Table names and column details

Internal IP addresses

With this information, hackers can strategize targeted attacks to access sensitive data. They may also use the error details to fingerprint your application and look for known vulnerabilities to exploit.

To add to the risks, users often share error message screenshots on forums while seeking help. This further amplifies the surface area for information exposure and malicious use. Clearly, error message security merits more attention to build safer applications and gain user trust.

With some caution and best practices, you can avoid these data leaks and reduce risks to your application and users. Tighten error message controls today to close doors to unwanted information exposure. Your users and reputation will thank you for it!

Major Brands Impacted by Error Message Vulnerabilities

Major companies have fallen victim to information exposure through error messages. In 2017, a vulnerability in Instagram's API exposed the personal details of 6 million influencers. An error in Facebook's API the same year leaked the private info of 14 million users.

These incidents highlight why you should care about error message vulnerabilities. As a business, your app's error messages could reveal critical data to anyone who triggers them. For users, your personal information may be at risk if your services haven't properly addressed this issue.

What can you do? If you're developing an app, rigorously test for error message vulnerabilities. Monitor for exposed PII or API keys and fix any issues immediately. For extra security, don't include sensitive data in error messages at all.

In today's world of cyber threats, infosec should be a top concern, not an afterthought.

Best Practices to Prevent Information Exposure Through Error Messages Mitigation Techniques:

To prevent information exposure through error messages, follow these best practices:

Obfuscate error messages

Don't display detailed error messages to end users. Return generic messages like "Something went wrong. Please try again later." and log the actual error to view internally. This hides potentially sensitive info from users while allowing you to troubleshoot issues.

Remove sensitive data from logs

Scrub logs and error messages of any personal user data before displaying or logging them. Remove things like usernames, passwords, account numbers, etc. Only keep non-sensitive technical details needed to diagnose and fix the problem.

Tighten API security

Lock down your API to prevent unauthorized access. Use an API gateway to add authentication and rate limiting. This reduces the risk of an attacker flooding your API to force error messages and gain access to sensitive data.

Conduct regular audits

Actively audit your app for information exposure vulnerabilities. Scan for improper logging of sensitive data, verbose error messages shown to users, open API endpoints, and more. Find and patch any issues to ensure user data stays private and secure.

Educate your team

Developer education is key. Train your team on secure coding practices for logging, error handling, and API security. Explain the importance of privacy and data protection to build a culture focused on user security. With the right knowledge and mindset, your team can build secure apps from the start.

Appknox Mobile Security Solutions

Appknox offers a range of mobile security solutions to help developers build secure apps and ensure information exposure vulnerabilities are properly addressed. Our mobile app security testing platform performs automated scans to detect issues like:

Error messages revealing sensitive data: Appknox analyzes your app for errors that could leak personal information, API keys, or other critical data. We suggest fixes to prevent this exposure and help you patch the vulnerabilities.

Unprotected data storage: The platform checks if your app securely stores data, photos, login credentials and other sensitive information. Weak or improper data storage leaves data vulnerable to access by unauthorized users.

Broken cryptography: Appknox evaluates your app’s encryption methods to ensure sensitive data and communications are properly protected. Faulty or weak cryptography can compromise user information and privacy.

In addition to automated security testing, Appknox offers remediation support to help developers properly fix any vulnerabilities found. We also provide recommendations and best practices to strengthen your mobile app security, safeguarding your users and brand reputation.

Frequently Asked Questions (FAQs)

What is information exposure through error messages, and why should mobile app developers and owners be concerned about it?

Information exposure through error messages occurs when sensitive data is unintentionally revealed in in-app error messages. Developers and owners should care because it compromises user privacy, exposes critical data, and can lead to security breaches, harming their brand reputation.

How can I prevent information exposure through error messages in my mobile app?

To prevent information exposure, follow best practices such as obfuscating error messages shown to end users, removing sensitive data from logs, tightening API security, and conducting regular audits for vulnerabilities. Educating your development team on secure coding practices is also crucial.

What are the potential risks of information exposure through error messages to my app users?

Information exposure puts app users at risk of data theft, identity fraud, and targeted attacks. Exposed personal information, API keys, or technical details can be exploited by hackers to compromise user accounts and gain unauthorized access.

Can you provide examples of well-known apps or companies impacted by error message vulnerabilities?

Certainly! Instagram and Facebook faced data breaches due to error message vulnerabilities, exposing millions of user records. Such incidents highlight the severity of the issue and underscore the importance of proactive security measures.

How can Appknox help in addressing information exposure through error messages?

Appknox offers advanced mobile app security solutions, including automated scans that detect error messages revealing sensitive data. It suggests fixes to patch vulnerabilities, conducts regular audits and provides remediation support to ensure your app stays secure and protected from information exposure.


Error messages may seem minor, but they can lead to major consequences, risking personal data, finances, and user trust. As an app user or developer, prioritize error handling to safeguard sensitive information. Choose Appknox for advanced mobile app security solutions. Protect your users and your business. Solve the problem of information exposure through error messages today.