CVE-2025-59016
📋 TL;DR
This vulnerability allows authenticated backend users in TYPO3 CMS to obtain sensitive file path information through error messages when file operations fail. It affects TYPO3 installations with vulnerable versions where backend users have access to file management functions. The exposure could aid attackers in mapping server directory structures.
💻 Affected Systems
- TYPO3 CMS
📦 What is this software?
Typo3 by Typo3
Typo3 by Typo3
Typo3 by Typo3
Typo3 by Typo3
Typo3 by Typo3
⚠️ Risk & Real-World Impact
Worst Case
Attackers could combine path disclosure with other vulnerabilities to target specific files or directories, potentially leading to information disclosure or file manipulation.
Likely Case
Backend users with malicious intent could map server directory structures, aiding in reconnaissance for further attacks.
If Mitigated
With proper access controls limiting backend user privileges, the impact is reduced to minimal information disclosure.
🎯 Exploit Status
Requires authenticated backend access and knowledge of how to trigger file operation errors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: TYPO3 v9 LTS: 9.5.55, v10 LTS: 10.4.54, v11 LTS: 11.5.48, v12 LTS: 12.4.37, v13 LTS: 13.4.18
Vendor Advisory: https://typo3.org/security/advisory/typo3-core-sa-2025-020
Restart Required: No
Instructions:
1. Backup your TYPO3 installation. 2. Update to the patched version via Composer: 'composer update typo3/cms-core'. 3. Clear all caches in the TYPO3 backend. 4. Verify the update completed successfully.
🔧 Temporary Workarounds
Restrict backend user permissions
allLimit file operation permissions for backend users to reduce attack surface.
Disable detailed error messages
allConfigure TYPO3 to show generic error messages instead of detailed ones.
$GLOBALS['TYPO3_CONF_VARS']['SYS']['displayErrors'] = 0;
🧯 If You Can't Patch
- Implement strict access controls to limit which backend users can perform file operations.
- Monitor backend user activity for unusual file operation attempts and error message access.
🔍 How to Verify
Check if Vulnerable:
Check TYPO3 version in backend under 'Admin Tools > System > Environment' or via composer.json.Check Version:
php typo3/sysext/core/bin/typo3 --versionVerify Fix Applied:
Verify version is updated to patched version and test that file operation errors no longer reveal full paths.📡 Detection & Monitoring
Log Indicators:
- Multiple failed file operations from same backend user
- Error logs containing full file paths in error messages
Network Indicators:
- Unusual backend user activity patterns
SIEM Query:
source="typo3.log" AND "failed file operation" AND "path:"