CVE-2025-55886
📋 TL;DR
An authenticated attacker can manipulate the fe_uid parameter in ARD's payment history API to view other users' payment records without authorization. This affects all ARD systems with the vulnerable API endpoint. The vulnerability exposes sensitive financial transaction data.
💻 Affected Systems
- ARD
⚠️ 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
Mass data breach of all user payment histories, leading to financial fraud, identity theft, and regulatory penalties.
Likely Case
Targeted access to specific users' payment histories for reconnaissance or blackmail.
If Mitigated
Limited exposure if proper access controls and parameter validation are implemented.
🎯 Exploit Status
Requires authenticated access but manipulation of the fe_uid parameter is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - check vendor advisory for specific version
Vendor Advisory: https://services.ard.fr
Restart Required: No
Instructions:
1. Check vendor advisory at services.ard.fr 2. Apply the latest security patch 3. Verify the fix by testing parameter manipulation
🔧 Temporary Workarounds
Implement server-side authorization checks
allAdd proper authorization validation to ensure users can only access their own payment history
N/A - requires code changes
Use UUIDs instead of sequential IDs
allReplace predictable fe_uid values with cryptographically secure random identifiers
N/A - requires code changes
🧯 If You Can't Patch
- Implement WAF rules to detect and block suspicious fe_uid parameter manipulation
- Enable detailed logging of all payment history API access and monitor for unauthorized patterns
🔍 How to Verify
Check if Vulnerable:
Authenticate to the system and attempt to access payment history with another user's fe_uid parameter valueCheck Version:
Check ARD system version through admin interface or vendor documentationVerify Fix Applied:
Test that manipulating fe_uid parameter no longer returns other users' payment data📡 Detection & Monitoring
Log Indicators:
- Multiple payment history requests with different fe_uid values from same user session
- Access denied logs for payment history API with unauthorized fe_uid values
Network Indicators:
- Unusual patterns of payment history API calls
- Rapid sequential fe_uid parameter changes in requests
SIEM Query:
source="payment_api" AND (fe_uid NOT IN authorized_user_ids OR fe_uid_changes > threshold)