CVE-2025-15148
📋 TL;DR
CVE-2025-15148 is a code injection vulnerability in CmsEasy's backend template management that allows attackers to execute arbitrary code by manipulating template content. This affects CmsEasy installations up to version 7.7.7 with the backend accessible. Attackers can exploit this remotely to compromise the CMS installation.
💻 Affected Systems
- CmsEasy
📦 What is this software?
Cmseasy by Cmseasy
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing remote code execution, data theft, website defacement, and installation of backdoors or malware.
Likely Case
Website defacement, data manipulation, or installation of web shells leading to persistent access and further exploitation.
If Mitigated
Limited impact with proper network segmentation, WAF filtering, and restricted backend access preventing exploitation attempts.
🎯 Exploit Status
Exploit details have been published and require backend authentication. The vulnerability is in a core administrative function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to any future version beyond 7.7.7 if released by vendor, or implement workarounds.
🔧 Temporary Workarounds
Restrict Backend Access
allLimit access to the admin panel using IP whitelisting or network segmentation
# Configure firewall rules to restrict /admin/ paths
# Example: iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
# Example: iptables -A INPUT -p tcp --dport 80 -j DROP
WAF Rule Implementation
allAdd web application firewall rules to block template content manipulation attempts
# ModSecurity rule example: SecRule ARGS:content "@rx (?:\$\{|eval\()" "id:1001,phase:2,deny,msg:'CVE-2025-15148 exploit attempt'"
# Add similar rule for tempdata parameter
🧯 If You Can't Patch
- Disable or remove the vulnerable template_admin.php file if not required
- Implement strict input validation and output encoding for all template content parameters
🔍 How to Verify
Check if Vulnerable:
Check if CmsEasy version is 7.7.7 or earlier and if /lib/admin/template_admin.php exists with the savetemp_action functionCheck Version:
grep -r "version.*7\." /path/to/cmseasy/ or check admin panel dashboardVerify Fix Applied:
Verify template_admin.php has been modified with proper input validation or removed, and test template functionality📡 Detection & Monitoring
Log Indicators:
- POST requests to template_admin.php with suspicious content/tempdata parameters
- Unusual file modifications in template directories
- PHP execution errors in web logs
Network Indicators:
- HTTP requests containing eval(), system(), or other PHP execution functions in template parameters
- Unusual outbound connections from web server
SIEM Query:
source="web_logs" AND (uri_path="*template_admin*" AND (param_content="*eval*" OR param_tempdata="*system*"))