CVE-2025-52827
📋 TL;DR
A deserialization vulnerability in the uxper Nuss WordPress theme allows attackers to inject malicious objects by manipulating serialized data. This affects all Nuss theme installations from unknown versions through 1.3.3. Successful exploitation could lead to remote code execution or other malicious activities.
💻 Affected Systems
- uxper Nuss 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 ransomware deployment.
Likely Case
Arbitrary file upload leading to backdoor installation, privilege escalation, or data manipulation.
If Mitigated
Limited impact with proper input validation and security controls in place.
🎯 Exploit Status
Deserialization vulnerabilities are commonly exploited with publicly available tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.4 or later
Vendor Advisory: https://patchstack.com/database/wordpress/theme/nuss/vulnerability/wordpress-nuss-1-3-3-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 Nuss theme updates. 4. Update to version 1.3.4 or later. 5. If no update available, replace with secure alternative.
🔧 Temporary Workarounds
Disable Nuss Theme
allTemporarily disable the vulnerable theme until patched.
wp theme deactivate nuss
Input Validation Filter
allAdd custom input validation to block serialized data.
Add PHP filter to functions.php: if (unserialize($input) !== false) { return false; }
🧯 If You Can't Patch
- Replace Nuss theme with secure alternative theme
- Implement WAF rules to block serialized data patterns
🔍 How to Verify
Check if Vulnerable:
Check WordPress theme version in Appearance > Themes or use: wp theme list | grep nussCheck Version:
wp theme list | grep nussVerify Fix Applied:
Confirm Nuss theme version is 1.3.4 or later using: wp theme list | grep nuss📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests containing serialized data patterns
- PHP error logs showing unserialize() warnings
Network Indicators:
- HTTP requests with serialized object payloads
- Unusual traffic to theme-specific endpoints
SIEM Query:
source="web_logs" AND ("unserialize" OR "O:" OR "a:" OR "s:") AND uri="*nuss*"