CVE-2025-8228
📋 TL;DR
This critical vulnerability in ChanCMS allows attackers to perform server-side request forgery (SSRF) by manipulating the targetUrl parameter in the getPages function. Attackers can exploit this remotely to make the server send requests to internal or external systems, potentially accessing sensitive data or services. All users running ChanCMS versions up to 3.1.2 are affected.
💻 Affected Systems
- ChanCMS
📦 What is this software?
Chancms by Chancms
⚠️ Risk & Real-World Impact
Worst Case
Attackers could use the vulnerable server as a proxy to attack internal systems, access cloud metadata services, perform port scanning, or retrieve sensitive files from internal networks.
Likely Case
Attackers will exploit this to access internal services, scan internal networks, or use the server to attack other external systems while hiding their origin.
If Mitigated
With proper network segmentation and egress filtering, the impact is limited to the server itself making unauthorized external requests.
🎯 Exploit Status
Exploit details have been publicly disclosed. The vulnerability requires minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.1.3
Vendor Advisory: https://gitee.com/yanyutao0402/ChanCMS/releases/tag/V3.1.3
Restart Required: Yes
Instructions:
1. Backup your current installation. 2. Download version 3.1.3 from the official repository. 3. Replace the affected files or perform a complete upgrade. 4. Restart the web server/service.
🔧 Temporary Workarounds
Block access to vulnerable endpoint
allTemporarily block access to the /cms/collect/getPages endpoint using web server configuration or WAF rules.
# For Apache: RewriteRule ^/cms/collect/getPages - [F,L]
# For Nginx: location ~ ^/cms/collect/getPages { deny all; }
Input validation at proxy/WAF
allImplement input validation for targetUrl parameter to block SSRF attempts.
# WAF rule to block SSRF patterns in targetUrl parameter
🧯 If You Can't Patch
- Implement strict egress filtering to limit outbound connections from the server
- Deploy network segmentation to isolate the vulnerable server from sensitive internal systems
🔍 How to Verify
Check if Vulnerable:
Check if your ChanCMS version is 3.1.2 or earlier. Test if the /cms/collect/getPages endpoint accepts arbitrary URLs in the targetUrl parameter.Check Version:
Check the version file or configuration in your ChanCMS installation directoryVerify Fix Applied:
After upgrading to 3.1.3, verify that the getPages function properly validates and restricts targetUrl values.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from the server
- Requests to /cms/collect/getPages with suspicious targetUrl parameters
- Requests to internal IP addresses or cloud metadata services
Network Indicators:
- Server making unexpected outbound HTTP requests
- Requests to unusual ports or internal network ranges
SIEM Query:
source="web_server" AND (uri="/cms/collect/getPages" AND targetUrl CONTAINS "internal" OR targetUrl CONTAINS "localhost" OR targetUrl CONTAINS "127.0.0.1" OR targetUrl CONTAINS "metadata")