CVE-2025-6839
📋 TL;DR
A critical backdoor vulnerability in Conjure Position Department Service Quality Evaluation System allows remote attackers to execute arbitrary code via manipulation of the payload argument in the eval function. This affects all systems running versions up to 1.0.11. The vulnerability is remotely exploitable and a public proof-of-concept exists.
💻 Affected Systems
- Conjure Position Department Service Quality Evaluation System
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to install persistent backdoors, exfiltrate sensitive data, pivot to other systems, or deploy ransomware.
Likely Case
Unauthorized remote code execution leading to data theft, system manipulation, or service disruption.
If Mitigated
Limited impact through network segmentation, but still potential for lateral movement within segmented environment.
🎯 Exploit Status
Proof-of-concept exploit is publicly available, making exploitation trivial for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Check vendor website for updates. Consider removing or replacing the software.
🔧 Temporary Workarounds
Remove vulnerable file
linuxDelete or rename the vulnerable PHP file to prevent exploitation
rm public/assets/less/bootstrap-less/mixins/head.php
mv public/assets/less/bootstrap-less/mixins/head.php public/assets/less/bootstrap-less/mixins/head.php.disabled
Restrict file access
allConfigure web server to block access to the vulnerable file
# Apache: Add to .htaccess
<Files "head.php">
Order Allow,Deny
Deny from all
</Files>
# Nginx: Add to server block
location ~ /head\.php$ {
deny all;
return 403;
}
🧯 If You Can't Patch
- Isolate affected systems in a separate network segment with strict firewall rules
- Implement web application firewall (WAF) rules to block requests containing suspicious eval patterns
🔍 How to Verify
Check if Vulnerable:
Check if file exists: ls -la public/assets/less/bootstrap-less/mixins/head.php. Check version in software admin panel or configuration files.Check Version:
Check software documentation or admin interface for version information. No standard command available.Verify Fix Applied:
Verify file is removed or inaccessible via web browser: curl -I http://yourserver/public/assets/less/bootstrap-less/mixins/head.php should return 404 or 403.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /public/assets/less/bootstrap-less/mixins/head.php
- Unusual PHP eval errors in web server logs
- Suspicious POST data containing PHP code
Network Indicators:
- Unusual outbound connections from web server
- Traffic patterns suggesting command-and-control communication
SIEM Query:
source="web_server" AND (uri="/public/assets/less/bootstrap-less/mixins/head.php" OR message="eval()" OR message="head.php")