CVE-2025-1556
📋 TL;DR
A remote deserialization vulnerability exists in westboy CicadasCMS 1.0's Template Management component at /system. Attackers can exploit this to execute arbitrary code or manipulate application logic. All users running CicadasCMS 1.0 with the vulnerable component are affected.
💻 Affected Systems
- westboy CicadasCMS
📦 What is this software?
Cicadascms by Westboy
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application compromise allowing data manipulation, privilege escalation, or denial of service.
If Mitigated
Limited impact with proper input validation and deserialization controls in place.
🎯 Exploit Status
Public exploit available on GitHub, remote attack vector with low complexity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None known
Restart Required: No
Instructions:
No official patch available. Consider upgrading if newer version exists or apply workarounds.
🔧 Temporary Workarounds
Disable Template Management
linuxRemove or disable the vulnerable /system Template Management component.
# Remove or rename the vulnerable directory
mv /path/to/CicadasCMS/system /path/to/CicadasCMS/system_disabled
Web Application Firewall Rules
allBlock requests to /system endpoint with deserialization patterns.
# Example ModSecurity rule
SecRule REQUEST_URI "@beginsWith /system" "id:1001,phase:1,deny,status:403"
🧯 If You Can't Patch
- Isolate the CicadasCMS instance behind a reverse proxy with strict input validation.
- Implement network segmentation to limit access to only trusted users.
🔍 How to Verify
Check if Vulnerable:
Check if CicadasCMS version is 1.0 and /system endpoint is accessible.Check Version:
Check application documentation or configuration files for version information.Verify Fix Applied:
Verify /system endpoint returns 403 or is inaccessible after applying workarounds.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /system endpoint
- Deserialization errors in application logs
Network Indicators:
- HTTP requests containing serialized objects to /system
SIEM Query:
source="web_logs" AND uri="/system" AND (method="POST" OR method="PUT")