CVE-2025-11812
📋 TL;DR
The Reuse Builder WordPress plugin has a stored XSS vulnerability in all versions up to 1.7. Authenticated attackers with contributor-level access or higher can inject malicious scripts via the 'reuse_builder_single_post_title' shortcode, which execute when users view affected pages. This affects all WordPress sites using vulnerable versions of the plugin.
💻 Affected Systems
- Reuse Builder 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 steal administrator credentials, deface websites, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Attackers with contributor accounts inject malicious scripts to steal user session cookies or display phishing content to visitors.
If Mitigated
With proper input validation and output escaping, the vulnerability would be prevented, allowing only safe HTML/CSS in the style attribute.
🎯 Exploit Status
Exploitation requires authenticated access (contributor role or higher). The vulnerability is in the style attribute handling, making injection straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 1.8 or later
Vendor Advisory: https://wordpress.org/plugins/reuse-builder/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Reuse Builder' and click 'Update Now'. 4. Verify the plugin version is 1.8 or higher.
🔧 Temporary Workarounds
Disable Reuse Builder Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate reuse-builder
Remove Contributor Role Access
allRestrict plugin access to administrators only
Use WordPress role management plugins or custom code to modify capabilities
🧯 If You Can't Patch
- Remove the Reuse Builder plugin entirely from your WordPress installation
- Implement a web application firewall (WAF) with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins → Reuse Builder version. If version is 1.7 or lower, you are vulnerable.Check Version:
wp plugin get reuse-builder --field=versionVerify Fix Applied:
After updating, verify the plugin version shows 1.8 or higher in the WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php or admin-post.php containing 'reuse_builder_single_post_title' with script tags
- Multiple failed login attempts followed by successful contributor-level login
Network Indicators:
- Outbound connections to suspicious domains from your WordPress server after page views
- Unusual JavaScript payloads in HTTP responses containing the vulnerable shortcode
SIEM Query:
source="wordpress.log" AND ("reuse_builder_single_post_title" AND ("script" OR "javascript" OR "onload"))