CVE-2025-67996
📋 TL;DR
This CVE describes a PHP object injection vulnerability in the BoldThemes Nestin WordPress theme. Attackers can exploit insecure deserialization to execute arbitrary code or manipulate application logic. All WordPress sites using Nestin theme versions before 1.2.6 are affected.
💻 Affected Systems
- BoldThemes Nestin 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
Remote code execution leading to complete system compromise, data theft, or website defacement.
Likely Case
Arbitrary code execution within WordPress context, potentially gaining administrative access or installing backdoors.
If Mitigated
Limited impact if proper input validation and output encoding are implemented elsewhere in the application.
🎯 Exploit Status
Exploitation requires understanding of PHP object injection techniques and WordPress architecture.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.2.6
Vendor Advisory: https://patchstack.com/database/Wordpress/Theme/nestin/vulnerability/wordpress-nestin-theme-1-2-6-php-object-injection-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Appearance > Themes. 3. Update Nestin theme to version 1.2.6 or later. 4. Clear any caching plugins/CDN caches.
🔧 Temporary Workarounds
Disable vulnerable theme
allSwitch to a different WordPress theme temporarily
Web Application Firewall rule
allBlock requests containing serialized PHP objects
🧯 If You Can't Patch
- Implement strict input validation for all user-controlled data
- Deploy a WAF with rules to detect and block deserialization attacks
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes for Nestin theme version. If version is below 1.2.6, you are vulnerable.Check Version:
Check WordPress admin panel or inspect theme files for version informationVerify Fix Applied:
Confirm Nestin theme version is 1.2.6 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual PHP errors related to unserialize()
- Suspicious POST requests to theme files
- Unexpected file modifications in theme directory
Network Indicators:
- HTTP requests containing serialized PHP objects in parameters
- Traffic to theme-specific endpoints with unusual payloads
SIEM Query:
source="web_logs" AND (uri_path="*nestin*" OR uri_path="*theme*" OR user_agent="*serialize*" OR params="*O:*" OR params="*C:*")