CVE-2024-31759
📋 TL;DR
This vulnerability in sanluan PublicCMS v4.0.202302.e allows attackers to escalate privileges through the change password function. Attackers can gain administrative access by exploiting insufficient access controls. All users running the affected version are vulnerable.
💻 Affected Systems
- sanluan PublicCMS
📦 What is this software?
Publiccms by Publiccms
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where attackers gain administrative privileges, potentially leading to data theft, website defacement, or further network penetration.
Likely Case
Attackers gain administrative access to the CMS, allowing content manipulation, user account compromise, and installation of backdoors.
If Mitigated
Limited impact if proper network segmentation and monitoring are in place, though administrative access would still be compromised.
🎯 Exploit Status
Exploit requires authenticated access but minimal technical skill. Public PoC available makes exploitation straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: No
Instructions:
No official patch available. Consider upgrading to latest version if vulnerability is fixed there, or implement workarounds.
🔧 Temporary Workarounds
Disable change password function
allTemporarily disable the vulnerable change password endpoint to prevent exploitation
Modify web server configuration to block access to /changePassword endpoint
Implement additional authentication
allAdd multi-factor authentication or additional verification for password changes
Implement custom authentication middleware for password change requests
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access the CMS administration interface
- Enable detailed logging and monitoring of all password change attempts and administrative actions
🔍 How to Verify
Check if Vulnerable:
Check if running PublicCMS version 4.0.202302.e. Test if unauthorized users can access password change functionality.Check Version:
Check CMS configuration files or admin panel for version informationVerify Fix Applied:
Verify that only authorized users with proper permissions can change passwords. Test privilege escalation attempts.📡 Detection & Monitoring
Log Indicators:
- Multiple failed password change attempts from single user
- Password changes from non-admin users
- Unusual administrative activity following password changes
Network Indicators:
- Unusual traffic patterns to password change endpoints
- Requests bypassing normal authentication flows
SIEM Query:
source="publiccms" AND (event="password_change" OR url="/changePassword") AND user_role!="admin"🔗 References
- https://1drv.ms/v/s%21AmTWEcd1YDpUjgoJ8lkA8pN8zYEJ?e=gIlbGf
- https://gist.github.com/menghaining/8d424faebfe869c80eadaea12bbdd158
- https://github.com/menghaining/PoC/blob/main/PublicCMS/publishCMS--PoC.md
- https://1drv.ms/v/s%21AmTWEcd1YDpUjgoJ8lkA8pN8zYEJ?e=gIlbGf
- https://gist.github.com/menghaining/8d424faebfe869c80eadaea12bbdd158
- https://github.com/menghaining/PoC/blob/main/PublicCMS/publishCMS--PoC.md
