CVE-2025-25789
📋 TL;DR
FoxCMS v1.2.5 contains a critical remote code execution vulnerability in the index() method of the Sitemap controller. This allows unauthenticated attackers to execute arbitrary code on affected systems. All deployments running FoxCMS v1.2.5 are vulnerable.
💻 Affected Systems
- FoxCMS
📦 What is this software?
Foxcms by Foxcms
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to install malware, steal data, pivot to internal networks, and establish persistent backdoors.
Likely Case
Web server compromise leading to data theft, defacement, or cryptocurrency mining operations.
If Mitigated
Limited impact due to network segmentation, minimal privileges, and active monitoring detecting exploitation attempts.
🎯 Exploit Status
Public exploit code is available, making this easily weaponizable by attackers with minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://foxcms.com
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement workarounds.
🔧 Temporary Workarounds
Disable Sitemap Controller
allRemove or rename the vulnerable Sitemap.php controller file to prevent exploitation.
mv /path/to/FoxCMS/controller/Sitemap.php /path/to/FoxCMS/controller/Sitemap.php.disabled
Web Application Firewall Rule
allBlock requests to the vulnerable endpoint using WAF rules.
WAF rule: Block requests containing 'Sitemap' in URL path or parameters
🧯 If You Can't Patch
- Isolate affected systems in a segmented network zone with strict egress filtering
- Implement strict file integrity monitoring on the FoxCMS installation directory
🔍 How to Verify
Check if Vulnerable:
Check if FoxCMS version is 1.2.5 by examining version files or admin panelCheck Version:
grep -r '1.2.5' /path/to/FoxCMS/ or check admin dashboardVerify Fix Applied:
Verify Sitemap.php controller is disabled or removed, and test RCE attempts fail📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to Sitemap controller
- System command execution in web logs
- Unexpected process spawns from web server
Network Indicators:
- Outbound connections from web server to suspicious IPs
- Unusual traffic patterns to/from FoxCMS server
SIEM Query:
source="web_logs" AND (url="*Sitemap*" OR cmd="*" OR process="*sh*")