CVE-2025-11745
📋 TL;DR
This stored XSS vulnerability in the Ad Inserter WordPress plugin allows authenticated attackers with contributor-level access or higher to inject malicious scripts via custom fields in the 'adinserter' shortcode. When users visit pages containing the injected scripts, arbitrary code executes in their browsers. All WordPress sites using vulnerable plugin versions are affected.
💻 Affected Systems
- Ad Inserter – Ad Manager & AdSense Ads 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 perform actions on behalf of authenticated users.
If Mitigated
With proper user access controls and content security policies, impact is limited to isolated script execution without data exfiltration.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once attacker has contributor privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.8.8 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3200000%40ad-inserter%2F2.8.8&old=3199999%40ad-inserter%2F2.8.7
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Ad Inserter – Ad Manager & AdSense Ads'. 4. Click 'Update Now' if available. 5. Alternatively, download version 2.8.8+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate ad-inserter
Restrict User Roles
allLimit contributor and author role assignments to trusted users only
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Regularly audit user accounts and remove unnecessary contributor/author roles
🔍 How to Verify
Check if Vulnerable:
Check plugin version in WordPress admin under Plugins → Installed Plugins. If version is 2.8.7 or lower, you are vulnerable.Check Version:
wp plugin get ad-inserter --field=versionVerify Fix Applied:
After updating, verify plugin version shows 2.8.8 or higher in WordPress admin.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to wp-admin with adinserter shortcode parameters
- Multiple failed login attempts followed by successful contributor-level login
Network Indicators:
- Unexpected outbound connections from WordPress server after page views
- Suspicious JavaScript payloads in HTTP requests
SIEM Query:
source="wordpress.log" AND ("adinserter" OR "shortcode") AND ("script" OR "javascript" OR "onerror")