CVE-2025-24876
📋 TL;DR
CVE-2025-24876 is an authentication bypass vulnerability in SAP Approuter Node.js package that allows attackers to steal user sessions during authorization code exchange. This enables unauthorized access to sensitive application data and functions. Organizations using SAP Approuter v16.7.1 or earlier are affected.
💻 Affected Systems
- SAP Approuter Node.js package
⚠️ 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
Complete compromise of application confidentiality and integrity, allowing attackers to access all user data, perform unauthorized transactions, and potentially pivot to other systems.
Likely Case
Session hijacking leading to unauthorized access to user accounts, data theft, and privilege escalation within the application.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring in place.
🎯 Exploit Status
Requires attacker to intercept or manipulate authorization code exchange process.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v16.7.2 or later
Vendor Advisory: https://me.sap.com/notes/3567974
Restart Required: No
Instructions:
1. Update @sap/approuter package to v16.7.2 or later using npm update @sap/approuter. 2. Verify the update completed successfully. 3. Test application functionality.
🔧 Temporary Workarounds
Network segmentation and monitoring
allIsolate SAP Approuter instances and monitor for suspicious authorization code exchange patterns
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure of vulnerable instances
- Enhance session monitoring and implement immediate session termination for suspicious activities
🔍 How to Verify
Check if Vulnerable:
Check package.json or run npm list @sap/approuter to see if version is 16.7.1 or earlierCheck Version:
npm list @sap/approuter | grep @sap/approuterVerify Fix Applied:
Confirm @sap/approuter version is 16.7.2 or later using npm list @sap/approuter📡 Detection & Monitoring
Log Indicators:
- Unusual authorization code exchange patterns
- Multiple session creations from single authorization
- Authorization requests with malformed parameters
Network Indicators:
- Abnormal authorization endpoint traffic
- Unexpected redirects during OAuth flow
SIEM Query:
source="approuter" AND (event="authorization_code_exchange" AND status="suspicious" OR user_agent="malicious")