CVE-2025-31631
📋 TL;DR
This CVE describes a PHP object injection vulnerability in the Fish House WordPress theme due to insecure deserialization of untrusted data. Attackers can exploit this to execute arbitrary code, potentially leading to full site compromise. It affects all WordPress sites using the Fish House theme versions up to and including 1.2.7.
💻 Affected Systems
- AncoraThemes Fish House 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 takeover, data theft, or ransomware deployment.
Likely Case
Unauthenticated attackers inject malicious objects to execute code, deface the site, or install backdoors.
If Mitigated
If patched or workarounds applied, risk is reduced to minimal with no known exploitation.
🎯 Exploit Status
Based on CWE-502 and CVSS 9.8, exploitation is likely straightforward, but no public proof-of-concept is confirmed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.2.7 (check vendor for exact version)
Vendor Advisory: https://patchstack.com/database/wordpress/theme/fish-house/vulnerability/wordpress-fish-house-1-2-7-php-object-injection-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Appearance > Themes. 3. Update the Fish House theme to the latest version. 4. Verify update completion and test site functionality.
🔧 Temporary Workarounds
Disable or Remove Theme
allTemporarily disable or delete the Fish House theme to prevent exploitation.
wp theme deactivate fish-house
wp theme delete fish-house
Restrict Access
allUse web application firewall (WAF) rules to block requests targeting the vulnerable theme endpoints.
🧯 If You Can't Patch
- Isolate the affected WordPress instance from critical networks to limit blast radius.
- Implement strict monitoring and logging for unusual activity related to theme files or PHP execution.
🔍 How to Verify
Check if Vulnerable:
Check the theme version in WordPress admin under Appearance > Themes or use command: wp theme list --name=fish-house --field=versionCheck Version:
wp theme list --name=fish-house --field=versionVerify Fix Applied:
Confirm the theme version is above 1.2.7 using the same command and test site for functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual PHP errors related to deserialization in WordPress or web server logs.
- Unexpected file modifications in theme directories.
Network Indicators:
- HTTP requests to Fish House theme-specific endpoints with serialized data payloads.
SIEM Query:
source="wordpress.log" AND ("fish-house" OR "deserialization" OR "PHP object injection")