CVE-2025-57055
📋 TL;DR
WonderCMS 3.5.0 contains a Server-Side Request Forgery (SSRF) vulnerability in its custom module installation feature. Authenticated administrators can exploit this by providing malicious URLs, causing the server to make unauthorized HTTP requests to internal or external systems. This affects all WonderCMS 3.5.0 installations with administrator access.
💻 Affected Systems
- WonderCMS
📦 What is this software?
Wondercms by Wondercms
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains access to internal services, exfiltrates sensitive data, or performs port scanning of internal networks through the vulnerable server.
Likely Case
Information disclosure from internal services, potential data exfiltration, or abuse of the server as a proxy for malicious requests.
If Mitigated
Limited impact due to network segmentation, proper access controls, and monitoring of outbound requests.
🎯 Exploit Status
Exploitation requires administrator credentials. The vulnerability is in the custom module installation functionality via the pluginThemeUrl parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.5.1 or later
Vendor Advisory: https://github.com/robiso/wondercms/releases
Restart Required: No
Instructions:
1. Backup your current installation. 2. Download WonderCMS 3.5.1 or later from the official repository. 3. Replace the vulnerable files with the patched version. 4. Verify the installation works correctly.
🔧 Temporary Workarounds
Input Validation Enhancement
allAdd server-side validation to restrict URLs to trusted domains only in the custom module installation functionality.
Modify the relevant PHP file to validate URLs against a whitelist of trusted domains before processing.
🧯 If You Can't Patch
- Restrict administrator access to trusted users only and implement strict network segmentation to limit the server's ability to reach internal services.
- Monitor and log all outbound HTTP requests from the WonderCMS server for suspicious activity.
🔍 How to Verify
Check if Vulnerable:
Check if your WonderCMS version is 3.5.0 by reviewing the version file or admin panel.Check Version:
Check the version.txt file in the WonderCMS root directory or view the admin dashboard.Verify Fix Applied:
Verify the installation is running WonderCMS 3.5.1 or later and test the custom module installation with a controlled URL.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from the WonderCMS server to internal IP addresses or unexpected domains.
- Multiple failed attempts to install custom modules with unusual URLs.
Network Indicators:
- HTTP requests from the WonderCMS server to internal services not typically accessed.
- Increased outbound traffic to unfamiliar domains.
SIEM Query:
source="wondercms-logs" AND (url="*pluginThemeUrl*" AND NOT domain IN ("trusted-domain1.com", "trusted-domain2.com"))