CVE-2025-62517
📋 TL;DR
This CVE describes a prototype pollution vulnerability in Rollbar.js's merge() function when rollbar.configure() is called with untrusted input. Attackers could modify JavaScript object prototypes, potentially leading to denial of service, remote code execution, or privilege escalation. Applications using vulnerable versions of Rollbar.js with user-controlled configuration inputs are affected.
💻 Affected Systems
- Rollbar.js
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, or lateral movement within the environment.
Likely Case
Denial of service through application crashes or unexpected behavior, or limited privilege escalation within the application context.
If Mitigated
No impact if untrusted input is properly validated before being passed to rollbar.configure().
🎯 Exploit Status
Exploitation requires the attacker to control input passed to rollbar.configure(), which may require specific application logic. No public proof-of-concept has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.26.5 or 3.0.0-beta5 and later
Vendor Advisory: https://github.com/rollbar/rollbar.js/security/advisories/GHSA-xcg2-9pp4-j82x
Restart Required: No
Instructions:
1. Update Rollbar.js to version 2.26.5 or higher if using the 2.x branch. 2. Update to 3.0.0-beta5 or higher if using the 3.x branch. 3. Update package.json dependencies accordingly. 4. Run npm update or yarn update to apply changes.
🔧 Temporary Workarounds
Input Validation Workaround
allEnsure that values passed to rollbar.configure() do not contain untrusted input. Validate and sanitize all configuration inputs before passing them to the configure method.
🧯 If You Can't Patch
- Implement strict input validation for all data passed to rollbar.configure() to prevent untrusted input.
- Monitor application logs for unusual configuration changes or prototype pollution attempts.
🔍 How to Verify
Check if Vulnerable:
Check package.json or node_modules/rollbar/package.json for version number. If version is below 2.26.5 or between 3.0.0-alpha1 and 3.0.0-beta4, the system is vulnerable.Check Version:
npm list rollbar or check package.json for "rollbar" versionVerify Fix Applied:
Verify that the Rollbar.js version is 2.26.5 or higher, or 3.0.0-beta5 or higher. Test that rollbar.configure() no longer accepts malicious input that could cause prototype pollution.📡 Detection & Monitoring
Log Indicators:
- Unusual configuration changes in Rollbar logs
- Unexpected prototype modifications in JavaScript error logs
- Application crashes or abnormal behavior after configuration updates
Network Indicators:
- Unusual HTTP requests containing configuration payloads to Rollbar endpoints
SIEM Query:
Search for logs containing 'rollbar.configure' with suspicious payloads or patterns indicating prototype pollution attempts.🔗 References
- https://github.com/rollbar/rollbar.js/commit/61032fe6c208b71e249514800808a54bcb8cb8bb
- https://github.com/rollbar/rollbar.js/commit/d717def8b68f4a947975d0aebb729869cdb2d343
- https://github.com/rollbar/rollbar.js/pull/1390
- https://github.com/rollbar/rollbar.js/pull/1394
- https://github.com/rollbar/rollbar.js/security/advisories/GHSA-xcg2-9pp4-j82x
