CVE-2024-22817
📋 TL;DR
FlyCms v1.0 contains a CSRF vulnerability in the email configuration update endpoint that allows attackers to trick authenticated administrators into making unauthorized changes to email settings. This affects all FlyCms v1.0 installations with the vulnerable endpoint accessible. Attackers can exploit this by luring administrators to malicious web pages while logged into FlyCms.
💻 Affected Systems
- FlyCms
📦 What is this software?
Flycms by Flycms Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers could reconfigure email settings to intercept password reset emails, compromise administrator accounts, and take full control of the CMS instance.
Likely Case
Attackers modify email configuration to redirect system emails to attacker-controlled addresses, enabling credential theft and unauthorized access.
If Mitigated
With proper CSRF protections, the vulnerability is neutralized and no unauthorized configuration changes can occur.
🎯 Exploit Status
CSRF exploits are well-understood and easy to weaponize. The vulnerability requires the victim to be authenticated as an administrator.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Implement CSRF protection tokens on all state-changing endpoints, particularly /system/email/email_conf_updagte.
🔧 Temporary Workarounds
Implement CSRF Protection
allAdd CSRF tokens to the email configuration update form and validate them server-side
Modify /system/email/email_conf_updagte endpoint to require and validate CSRF tokens
Restrict Access
allRestrict access to the vulnerable endpoint using network controls or authentication requirements
Configure web server to restrict /system/email/email_conf_updagte to specific IPs or require additional authentication
🧯 If You Can't Patch
- Implement SameSite cookies and require additional authentication for sensitive operations
- Monitor email configuration changes and alert on unauthorized modifications
🔍 How to Verify
Check if Vulnerable:
Check if /system/email/email_conf_updagte endpoint accepts POST requests without CSRF token validationCheck Version:
Check FlyCms version in admin panel or configuration filesVerify Fix Applied:
Test that POST requests to /system/email/email_conf_updagte without valid CSRF tokens are rejected📡 Detection & Monitoring
Log Indicators:
- Unauthorized email configuration changes
- Multiple failed CSRF token validations
- Suspicious POST requests to /system/email/email_conf_updagte
Network Indicators:
- POST requests to /system/email/email_conf_updagte without referrer headers or from suspicious sources
SIEM Query:
source="web_server" AND (uri="/system/email/email_conf_updagte" AND method="POST") AND NOT csrf_token_valid="true"