CVE-2023-45904
📋 TL;DR
Dreamer CMS v4.1.3 contains a CSRF vulnerability in the variable management modification function at /variable/update. This allows attackers to trick authenticated administrators into performing unauthorized actions like modifying system variables. All users running the vulnerable version are affected.
💻 Affected Systems
- Dreamer CMS
📦 What is this software?
Dreamer Cms by Iteachyou
⚠️ Risk & Real-World Impact
Worst Case
Attackers could modify critical system variables, potentially altering site configuration, enabling backdoors, or compromising the entire CMS installation.
Likely Case
Attackers modify less critical variables to deface websites, inject malicious content, or disrupt normal CMS operations.
If Mitigated
With proper CSRF protections, no unauthorized actions can be performed even if users are tricked into clicking malicious links.
🎯 Exploit Status
CSRF attacks are well-understood and easy to weaponize. The GitHub reference contains technical details about the vulnerability.
🛠️ 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 implement CSRF protection manually.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd CSRF token validation to the /variable/update endpoint
Modify the variable update function to include and validate CSRF tokens
Use SameSite Cookies
allConfigure session cookies with SameSite=Strict attribute
Set session cookie attributes: SameSite=Strict; Secure; HttpOnly
🧯 If You Can't Patch
- Restrict access to the admin interface using network controls or VPN
- Implement additional authentication factors for administrative actions
🔍 How to Verify
Check if Vulnerable:
Check if Dreamer CMS version is 4.1.3 and if /variable/update endpoint lacks CSRF protectionCheck Version:
Check CMS version in admin panel or configuration filesVerify Fix Applied:
Test if /variable/update endpoint now requires and validates CSRF tokens📡 Detection & Monitoring
Log Indicators:
- Multiple variable update requests from different IPs in short time
- Variable updates without corresponding admin login events
Network Indicators:
- POST requests to /variable/update without Referer header validation
- Suspicious external domains making requests to admin endpoints
SIEM Query:
source="web_logs" AND uri="/variable/update" AND NOT referer="*admin*"🔗 References
- https://github.com/moonsabc123/dreamer_cms/blob/main/There%20is%20a%20csrf%20vulnerability%20in%20the%20variable%20management%20modification%20function.md
- https://github.com/moonsabc123/dreamer_cms/blob/main/There%20is%20a%20csrf%20vulnerability%20in%20the%20variable%20management%20modification%20function.md
