CVE-2025-65868
📋 TL;DR
This XML external entity (XXE) injection vulnerability in eyoucms v1.7.1 allows remote attackers to cause denial of service by sending specially crafted POST requests. Attackers can exploit this to crash the application or potentially read sensitive files. All systems running the vulnerable version are affected.
💻 Affected Systems
- eyoucms
📦 What is this software?
Eyoucms by Eyoucms
⚠️ Risk & Real-World Impact
Worst Case
Complete application unavailability, potential sensitive file disclosure, and server resource exhaustion leading to system instability.
Likely Case
Application denial of service causing downtime and disruption to website functionality.
If Mitigated
Minimal impact with proper XML parsing configuration and input validation in place.
🎯 Exploit Status
Exploitation requires sending crafted XML in POST requests to vulnerable endpoints.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://github.com/weng-xianhu/eyoucms/issues/66
Restart Required: Yes
Instructions:
1. Monitor the GitHub issue for official patch. 2. Apply patch when available. 3. Restart the application service.
🔧 Temporary Workarounds
Disable XML external entity processing
allConfigure XML parser to disable external entity resolution
Modify XML parser configuration to set: feature_external_ges = false, feature_external_pes = false
Input validation and sanitization
allImplement strict input validation for XML content
Add XML schema validation and sanitize all XML input before processing
🧯 If You Can't Patch
- Implement WAF rules to block XXE patterns in POST requests
- Restrict access to vulnerable endpoints using network ACLs
🔍 How to Verify
Check if Vulnerable:
Test by sending crafted XML with external entity references in POST requests to application endpointsCheck Version:
Check eyoucms version in admin panel or configuration filesVerify Fix Applied:
Verify XML parser configuration disables external entities and test with XXE payloads📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests with XML content, application crash logs, increased error rates
Network Indicators:
- POST requests containing XML with DOCTYPE declarations or external entity references
SIEM Query:
source="web_logs" AND method="POST" AND (body="<!DOCTYPE" OR body="SYSTEM" OR body="ENTITY")