CVE-2025-53586
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code through PHP object injection via deserialization of untrusted data in the NooTheme WeMusic WordPress theme. All WordPress sites using WeMusic theme version 1.9.1 or earlier are affected. Attackers can exploit this without authentication to gain full control of affected websites.
💻 Affected Systems
- NooTheme WeMusic WordPress Theme
⚠️ 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 remote code execution, data theft, website defacement, and installation of persistent backdoors.
Likely Case
Remote code execution leading to website takeover, malware deployment, and data exfiltration.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though deserialization vulnerabilities often bypass standard web application firewalls.
🎯 Exploit Status
Public exploit details available on security research sites. PHP object injection vulnerabilities are commonly weaponized due to their reliability and impact.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.9.1 (check theme repository for latest)
Vendor Advisory: https://patchstack.com/database/Wordpress/Theme/noo-wemusic/vulnerability/wordpress-wemusic-theme-1-9-1-php-object-injection-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Appearance > Themes. 3. Check for WeMusic theme updates. 4. If update available, click Update. 5. If no update available, deactivate and remove the theme immediately.
🔧 Temporary Workarounds
Disable WeMusic Theme
allDeactivate and remove the vulnerable theme from WordPress
wp theme deactivate noo-wemusic
wp theme delete noo-wemusic
Web Application Firewall Rule
allBlock requests containing serialized PHP object patterns
ModSecurity rule: SecRule ARGS "@rx (O:\d+:\"[a-zA-Z_\\x7f-\\xff][a-zA-Z0-9_\\x7f-\\xff]*\"|C:\d+:\"[a-zA-Z_\\x7f-\\xff][a-zA-Z0-9_\\x7f-\\xff]*\")" "id:1001,phase:2,deny,status:403,msg:'PHP Object Injection Attempt'"
WAF configuration: Block patterns matching serialized PHP objects
🧯 If You Can't Patch
- Immediately deactivate and remove the WeMusic theme from all WordPress installations
- Implement strict input validation and sanitization for all user-controlled data, particularly focusing on deserialization functions
🔍 How to Verify
Check if Vulnerable:
Check WordPress theme version: 1. Navigate to Appearance > Themes in WordPress admin. 2. Find WeMusic theme. 3. Check version number. If version is 1.9.1 or earlier, you are vulnerable.Check Version:
wp theme list --name=noo-wemusic --field=versionVerify Fix Applied:
1. Update theme to latest version. 2. Verify version is above 1.9.1. 3. Test functionality to ensure theme works properly after update.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to theme files
- PHP errors related to unserialize() function
- Unexpected file creation in wp-content directory
- Suspicious process execution from web user context
Network Indicators:
- HTTP requests containing serialized PHP object patterns
- Unusual outbound connections from web server
- Traffic to known exploit servers
SIEM Query:
source="web_logs" AND (uri="*noo-wemusic*" OR uri="*wemusic*") AND (method="POST" OR method="PUT") AND (data="*O:*" OR data="*C:*" OR data="*s:*")