CVE-2025-52899
📋 TL;DR
This vulnerability in Tuleap's forgot password form allows attackers to enumerate valid usernames by observing differences in response times or error messages. It affects all Tuleap Community Edition installations before version 16.9.99.1750843170 and Tuleap Enterprise Edition installations before versions 16.8-4 and 16.9-2.
💻 Affected Systems
- Tuleap Community Edition
- Tuleap Enterprise Edition
📦 What is this software?
Tuleap by Enalean
Tuleap by Enalean
Tuleap by Enalean
⚠️ Risk & Real-World Impact
Worst Case
Attackers can identify all valid usernames in the system, enabling targeted phishing attacks, credential stuffing, or brute force attacks against known accounts.
Likely Case
Attackers discover valid usernames to build targeted attack lists, increasing success rates for subsequent credential-based attacks.
If Mitigated
Limited information disclosure with minimal impact if strong password policies, MFA, and account lockouts are properly configured.
🎯 Exploit Status
User enumeration vulnerabilities are commonly exploited using automated tools that test username validity through timing or error message analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Community Edition: 16.9.99.1750843170; Enterprise Edition: 16.8-4 or 16.9-2
Vendor Advisory: https://github.com/Enalean/tuleap/security/advisories/GHSA-xqf3-xxxf-x3c2
Restart Required: Yes
Instructions:
1. Backup your Tuleap installation and database. 2. Update to the patched version using your distribution's package manager or Tuleap upgrade process. 3. Restart Tuleap services. 4. Verify the fix by testing the forgot password functionality.
🔧 Temporary Workarounds
Disable Forgot Password Feature
linuxTemporarily disable the forgot password functionality to prevent exploitation while planning the upgrade.
# Edit Tuleap configuration to disable password reset
# Location varies by installation - typically in /etc/tuleap/conf/local.inc or similar
Implement Rate Limiting
linuxAdd rate limiting to the forgot password endpoint to make enumeration more difficult.
# Configure web server rate limiting (nginx example):
limit_req_zone $binary_remote_addr zone=password_reset:10m rate=5r/m;
location /account/lostpw {
limit_req zone=password_reset burst=10 nodelay;
}
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to detect and block user enumeration patterns
- Enable multi-factor authentication (MFA) for all accounts to reduce impact of credential attacks
🔍 How to Verify
Check if Vulnerable:
Test the forgot password form with valid and invalid usernames. If responses differ (timing, error messages, etc.), the system is vulnerable.Check Version:
tuleap versionVerify Fix Applied:
After patching, test the forgot password form - all username inputs should return identical responses regardless of validity.📡 Detection & Monitoring
Log Indicators:
- Multiple failed password reset attempts from single IP
- Unusual patterns of password reset requests for different usernames
Network Indicators:
- High volume of POST requests to /account/lostpw endpoint
- Sequential username testing patterns
SIEM Query:
source="tuleap" AND (url="/account/lostpw" OR action="password_reset") | stats count by src_ip, username🔗 References
- https://github.com/Enalean/tuleap/commit/5c72d6d253016d38ed472eb7918f772d074ddb07
- https://github.com/Enalean/tuleap/security/advisories/GHSA-xqf3-xxxf-x3c2
- https://tuleap.net/plugins/git/tuleap/tuleap/stable?a=commit&h=5c72d6d253016d38ed472eb7918f772d074ddb07
- https://tuleap.net/plugins/tracker/?aid=43674
