CVE-2025-46457
📋 TL;DR
A Cross-Site Request Forgery (CSRF) vulnerability in the Wp Custom CMS Block WordPress plugin allows attackers to perform stored cross-site scripting (XSS) attacks. This affects WordPress sites using the plugin version 2.1 and earlier. Attackers can trick authenticated administrators into executing malicious actions that inject persistent scripts.
💻 Affected Systems
- Wp Custom CMS Block WordPress Plugin
⚠️ 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
Attackers could inject malicious JavaScript that steals administrator credentials, redirects users to phishing sites, or takes full control of the WordPress site when administrators view affected pages.
Likely Case
Attackers create phishing pages that trick logged-in administrators into unknowingly executing actions that inject malicious scripts into the site's content, potentially compromising visitor sessions.
If Mitigated
With proper CSRF protections and content sanitization, the vulnerability would be prevented, maintaining normal plugin functionality without security risks.
🎯 Exploit Status
Exploitation requires tricking an authenticated administrator into visiting a malicious page. The CSRF-to-XSS chain is well-understood and weaponization is likely given the prevalence of WordPress.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Wp Custom CMS Block'. 4. Click 'Update Now' if available. 5. If no update appears, manually download version 2.2+ from WordPress repository and replace files.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate wp-custom-cms-block
Implement CSRF Protection
allAdd WordPress nonce verification to plugin forms
Add wp_nonce_field() and wp_verify_nonce() calls to plugin form handling
🧯 If You Can't Patch
- Disable the Wp Custom CMS Block plugin entirely
- Implement web application firewall rules to block suspicious POST requests to the plugin endpoints
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Installed Plugins for Wp Custom CMS Block version 2.1 or earlierCheck Version:
wp plugin get wp-custom-cms-block --field=versionVerify Fix Applied:
Verify plugin version is 2.2 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /wp-admin/admin-ajax.php with plugin-specific actions
- Multiple failed nonce verification attempts
Network Indicators:
- External sites embedding requests to your WordPress admin endpoints
- Suspicious referrer headers in admin area requests
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/admin-ajax.php" AND action="wp_custom_cms_block_*")