CVE-2025-48276
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in Visual Composer Website Builder allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. The vulnerability affects WordPress sites using Visual Composer Website Builder plugin versions up to 45.11.0. Attackers could steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users.
💻 Affected Systems
- Visual Composer Website 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, take over the WordPress site, install backdoors, or redirect all site visitors to malicious phishing pages.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, potentially compromising user accounts and performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users.
🎯 Exploit Status
Stored XSS typically requires some level of access to inject content, but once injected, affects all users viewing the compromised page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 45.11.0
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Visual Composer Website Builder. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Visual Composer Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate visualcomposer
Implement Content Security Policy
allAdd CSP headers to restrict script execution
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to wp-config.php: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Restrict plugin access to trusted users only
- Implement web application firewall with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins → Visual Composer Website Builder versionCheck Version:
wp plugin get visualcomposer --field=versionVerify Fix Applied:
Verify plugin version is greater than 45.11.0📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to Visual Composer endpoints
- Suspicious script tags in content updates
Network Indicators:
- Malicious JavaScript payloads in HTTP requests
- Unexpected external script loads from Visual Composer pages
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/admin-ajax.php" OR uri_path CONTAINS "visualcomposer") AND (http_method="POST" AND (request_body CONTAINS "<script>" OR request_body CONTAINS "javascript:"))