CVE-2026-23542
📋 TL;DR
This vulnerability allows attackers to inject malicious objects through deserialization of untrusted data in the Grand Restaurant WordPress theme. Successful exploitation could lead to remote code execution or data manipulation. All WordPress sites using Grand Restaurant theme versions up to and including 7.0.10 are affected.
💻 Affected Systems
- ThemeGoods Grand Restaurant 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 site compromise, data theft, or server takeover.
Likely Case
Arbitrary file upload leading to backdoor installation and persistent access.
If Mitigated
Limited impact if proper input validation and security plugins are in place.
🎯 Exploit Status
Deserialization vulnerabilities are commonly exploited and public details exist.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 7.0.10
Restart Required: No
Instructions:
1. Update Grand Restaurant theme to latest version via WordPress admin panel. 2. Verify theme version is >7.0.10. 3. Clear WordPress cache if applicable.
🔧 Temporary Workarounds
Disable vulnerable theme
allSwitch to default WordPress theme until patch is applied
wp theme activate twentytwentyfour
Web Application Firewall rule
allBlock deserialization attempts at WAF level
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all theme inputs
- Deploy web application firewall with PHP object injection protection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes for Grand Restaurant theme version <=7.0.10Check Version:
wp theme list --field=name,status,version | grep grandrestaurantVerify Fix Applied:
Confirm theme version is >7.0.10 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to theme files
- PHP serialized data in request logs
- Unexpected file uploads
Network Indicators:
- HTTP requests containing serialized PHP objects
- Requests to theme-specific endpoints with unusual parameters
SIEM Query:
source="web_logs" AND (uri="*grandrestaurant*" OR uri="*theme*" OR uri="*wp-content/themes/grandrestaurant*") AND (method="POST" OR method="PUT") AND (data="*O:*" OR data="*C:*" OR data="*a:*")