CVE-2023-52074
📋 TL;DR
FlyCms v1.0 contains a Cross-Site Request Forgery (CSRF) vulnerability in the web configuration update component. This allows attackers to trick authenticated administrators into performing unauthorized configuration changes. Only FlyCms v1.0 installations with administrative access are affected.
💻 Affected Systems
- FlyCms
📦 What is this software?
Flycms by Flycms Project
⚠️ Risk & Real-World Impact
Worst Case
Complete site takeover through configuration changes leading to arbitrary code execution, data theft, or site defacement.
Likely Case
Unauthorized configuration changes leading to site disruption, SEO poisoning, or injection of malicious content.
If Mitigated
Limited impact with proper CSRF protections and admin session management.
🎯 Exploit Status
CSRF attacks are well-understood and easy to implement. The vulnerability is in a critical configuration update endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available or implementing CSRF protections manually.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd CSRF token validation to the system/site/webconfig_update endpoint
Modify webconfig_update handler to require and validate CSRF tokens
SameSite Cookie Attribute
allSet SameSite=Strict or Lax on session cookies
Set-Cookie: session=value; SameSite=Strict; Secure; HttpOnly
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect CSRF attempts
- Restrict admin access to specific IP addresses or VPN-only access
🔍 How to Verify
Check if Vulnerable:
Check if FlyCms version is 1.0 and if system/site/webconfig_update endpoint lacks CSRF protectionCheck Version:
Check FlyCms configuration files or admin panel for version informationVerify Fix Applied:
Test if webconfig_update endpoint now requires and validates CSRF tokens📡 Detection & Monitoring
Log Indicators:
- Multiple configuration change requests from same admin session in short time
- Configuration changes without corresponding admin page visits
Network Indicators:
- POST requests to system/site/webconfig_update without Referer header validation
- Requests with unexpected Origin headers
SIEM Query:
source="web_logs" AND uri="/system/site/webconfig_update" AND NOT referer="*admin*"