CVE-2025-59015
📋 TL;DR
This vulnerability in TYPO3 CMS's password generation component uses a predictable three-character prefix, reducing randomness and making brute-force attacks against user passwords significantly faster. It affects TYPO3 CMS installations running versions 12.0.0-12.4.36 or 13.0.0-13.4.17.
💻 Affected Systems
- TYPO3 CMS
📦 What is this software?
Typo3 by Typo3
Typo3 by Typo3
⚠️ Risk & Real-World Impact
Worst Case
Attackers could brute-force administrative or user passwords, gaining unauthorized access to the CMS backend, potentially leading to site defacement, data theft, or privilege escalation.
Likely Case
Attackers with access to password hashes could crack passwords more efficiently, compromising user accounts with weak or reused passwords.
If Mitigated
With strong password policies and account lockouts, impact is limited to increased computational efficiency for attackers attempting to crack stored hashes.
🎯 Exploit Status
Exploitation requires access to password hashes (typically from database compromise) and computational resources for brute-forcing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: TYPO3 v12.4.37, v13.4.18
Vendor Advisory: https://typo3.org/security/advisory/typo3-core-sa-2025-019
Restart Required: No
Instructions:
1. Backup your TYPO3 installation and database. 2. Update TYPO3 core to v12.4.37 or v13.4.18 via Composer or TYPO3 backend. 3. Clear caches. 4. Verify update completed successfully.
🔧 Temporary Workarounds
Disable TYPO3 Password Generation
allUse external password generation tools or manually create strong passwords instead of relying on TYPO3's built-in generator.
🧯 If You Can't Patch
- Enforce strong password policies (minimum 12 characters, mixed case, numbers, symbols)
- Implement account lockout after failed login attempts and monitor authentication logs
🔍 How to Verify
Check if Vulnerable:
Check TYPO3 version in backend under Admin Tools > System > Environment or via composer show typo3/cms-core.Check Version:
composer show typo3/cms-core | grep versionVerify Fix Applied:
Confirm version is 12.4.37+ or 13.4.18+ and test password generation produces random strings without predictable prefixes.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts for user accounts
- Unusual authentication patterns
Network Indicators:
- Brute-force attack patterns against login endpoints
SIEM Query:
source="typo3" AND (event_type="failed_login" COUNT > 10 WITHIN 5m)