CVE-2025-46651
📋 TL;DR
Tiny File Manager versions up to 2.6 contain a server-side request forgery (SSRF) vulnerability in the URL upload feature. Attackers can bypass URL validation using specially crafted domain names like http://www.127.0.0.1.example.com/ to make requests to localhost/internal services. This affects any system running vulnerable Tiny File Manager instances, potentially exposing internal network services.
💻 Affected Systems
- Tiny File Manager
⚠️ 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
Full internal network reconnaissance, unauthorized access to internal services (databases, admin panels), data exfiltration, or lateral movement within the network.
Likely Case
Port scanning of internal services, limited data exposure from vulnerable internal endpoints, potential for further exploitation if vulnerable internal services exist.
If Mitigated
Limited to port scanning capabilities with no data access if internal services are properly secured with authentication.
🎯 Exploit Status
Exploitation requires access to the file upload feature. Public proof-of-concept demonstrates the bypass technique.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.6.1 or later
Vendor Advisory: https://github.com/RobertoLuzanilla/tinyfilemanager-security-advisories/blob/main/CVE-2025-46651.md
Restart Required: No
Instructions:
1. Download latest version from official repository. 2. Replace vulnerable tinyfilemanager.php file. 3. Verify URL validation improvements in upload functionality.
🔧 Temporary Workarounds
Disable URL Upload Feature
allRemove or disable the URL upload functionality in the configuration
Edit config.php and set 'upload_url' to false or remove URL upload UI elements
Network Segmentation
linuxRestrict Tiny File Manager's network access to prevent SSRF exploitation
iptables -A OUTPUT -p tcp -d 127.0.0.0/8 -j DROP
firewall-cmd --permanent --add-rich-rule='rule family="ipv4" destination address="127.0.0.0/8" drop'
🧯 If You Can't Patch
- Implement strict network egress filtering to block outbound connections to localhost/127.0.0.0/8
- Deploy a web application firewall (WAF) with SSRF protection rules
🔍 How to Verify
Check if Vulnerable:
Test URL upload with crafted domain like http://www.127.0.0.1.example.com/ and monitor if request reaches localhostCheck Version:
grep "define.*VERSION" tinyfilemanager.phpVerify Fix Applied:
Attempt same SSRF bypass after patch - should be blocked with proper URL validation📡 Detection & Monitoring
Log Indicators:
- Unusual URL upload attempts with localhost/127.0.0.1 variations
- Multiple failed upload attempts from single IP
Network Indicators:
- Outbound connections from web server to localhost/127.0.0.1 on unusual ports
- Port scanning patterns from web server
SIEM Query:
source="web_logs" AND (url CONTAINS "127.0.0.1" OR url CONTAINS "localhost") AND action="upload"