CVE-2025-9560
📋 TL;DR
The Colibri Page Builder WordPress plugin has a stored XSS vulnerability in its newsletter shortcode that allows authenticated attackers with contributor access or higher to inject malicious scripts into pages. These scripts execute when users view the compromised pages, potentially stealing credentials or performing unauthorized actions. All WordPress sites using this plugin up to version 1.0.334 are affected.
💻 Affected Systems
- Colibri Page 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, deface pages, or redirect users to malicious sites.
Likely Case
Attackers with contributor access inject malicious scripts to steal session cookies or user data from visitors viewing compromised pages.
If Mitigated
With proper access controls and content security policies, impact is limited to defacement or minor data leakage from affected pages.
🎯 Exploit Status
Requires authenticated access (contributor or higher) and knowledge of WordPress shortcode usage.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.0.334
Vendor Advisory: https://wordpress.org/plugins/colibri-page-builder/#developers
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Colibri Page Builder. 4. Click 'Update Now' if available. 5. If no update appears, manually download latest version from WordPress.org and replace plugin files.
🔧 Temporary Workarounds
Disable vulnerable shortcode
allRemove or disable the colibri_newsletter shortcode functionality
Add to theme's functions.php: remove_shortcode('colibri_newsletter');
Restrict user roles
allLimit contributor-level access to trusted users only
Review and minimize users with contributor, author, editor, or administrator roles
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Regularly audit user accounts and remove unnecessary contributor-level access
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Colibri Page Builder. If version is 1.0.334 or lower, you are vulnerable.Check Version:
wp plugin list --name=colibri-page-builder --field=versionVerify Fix Applied:
After updating, verify plugin version is higher than 1.0.334. Test newsletter shortcode functionality to ensure it still works without XSS.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to pages containing colibri_newsletter shortcode
- Multiple failed login attempts followed by successful contributor login
Network Indicators:
- Unexpected script tags in page responses containing newsletter-related attributes
SIEM Query:
source="wordpress.log" AND ("colibri_newsletter" OR "newsletter.php") AND (POST OR PUT)