CVE-2024-54880
📋 TL;DR
SeaCMS V13.1 contains an incorrect access control vulnerability that allows attackers to bypass registration limits and create accounts in bulk. This affects all SeaCMS V13.1 installations with user registration enabled. Attackers can exploit this logic flaw without authentication to flood the system with fake accounts.
💻 Affected Systems
- SeaCMS
📦 What is this software?
Seacms by Seacms
⚠️ Risk & Real-World Impact
Worst Case
Massive account creation leading to denial of service, spam campaigns, credential stuffing attacks, and potential data exfiltration if accounts gain elevated privileges.
Likely Case
Spam account creation overwhelming system resources, enabling follow-on attacks like phishing or credential stuffing against legitimate users.
If Mitigated
Limited impact with proper rate limiting and monitoring, though the fundamental access control flaw remains.
🎯 Exploit Status
The exploit requires no authentication and can be automated with simple scripts. Public proof-of-concept demonstrates the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://www.seacms.net/
Restart Required: No
Instructions:
No official patch available. Monitor SeaCMS website for updates. Consider upgrading to newer versions if available or implementing workarounds.
🔧 Temporary Workarounds
Disable User Registration
allTemporarily disable user registration functionality to prevent exploitation
Edit SeaCMS configuration to disable user registration (exact method depends on installation)
Implement Rate Limiting
linuxAdd rate limiting to registration endpoints using web server or application firewall
# Example nginx rate limiting
limit_req_zone $binary_remote_addr zone=registration:10m rate=1r/s;
limit_req zone=registration burst=5 nodelay;
🧯 If You Can't Patch
- Implement strict rate limiting on registration endpoints
- Monitor for unusual registration patterns and implement CAPTCHA
🔍 How to Verify
Check if Vulnerable:
Test if you can register multiple accounts rapidly without restrictions. Check SeaCMS version in admin panel or configuration files.Check Version:
Check SeaCMS version in admin panel or configuration files (no single command)Verify Fix Applied:
Verify rate limiting prevents bulk registration attempts. Confirm registration is disabled if that workaround is applied.📡 Detection & Monitoring
Log Indicators:
- Multiple account creation events from same IP in short timeframe
- Unusual registration patterns outside normal hours
Network Indicators:
- High volume of POST requests to registration endpoints
- Multiple registration attempts from single source
SIEM Query:
source="seacms.logs" AND (event="user_registration" OR uri="/register") | stats count by src_ip | where count > 10