CVE-2025-11856
📋 TL;DR
The Eventbee Ticketing Widget plugin for WordPress has a stored cross-site scripting (XSS) vulnerability that allows authenticated attackers with contributor-level access or higher to inject malicious scripts into website pages. These scripts execute whenever users visit the compromised pages, potentially stealing credentials or performing unauthorized actions. All WordPress sites using this plugin version 1.0 or earlier are affected.
💻 Affected Systems
- Eventbee Ticketing Widget 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 the website, or redirect visitors to malicious sites.
Likely Case
Attackers with contributor access inject malicious scripts to steal user session cookies, perform actions as other users, or display phishing content to visitors.
If Mitigated
With proper input validation and output escaping, the vulnerability is eliminated; with contributor access controls, attack surface is reduced.
🎯 Exploit Status
Exploitation requires authenticated access (contributor role or higher). The vulnerability is in a publicly accessible shortcode parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1 or later
Vendor Advisory: https://wordpress.org/plugins/eventbee-ticketing-widget/#developers
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Eventbee Ticketing Widget'. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete the plugin.
🔧 Temporary Workarounds
Remove Contributor Access
allTemporarily remove contributor-level access from untrusted users to prevent exploitation.
Disable Shortcode
allRemove or disable the 'eventbeeticketwidget' shortcode from posts/pages.
🧯 If You Can't Patch
- Deactivate and remove the Eventbee Ticketing Widget plugin immediately
- Implement web application firewall (WAF) rules to block XSS payloads in shortcode parameters
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for 'Eventbee Ticketing Widget' version 1.0 or earlier.Check Version:
wp plugin list --name=eventbee-ticketing-widget --field=version (WP-CLI)Verify Fix Applied:
Verify plugin version is 1.1 or later in WordPress admin panel, or confirm plugin is deactivated/removed.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress containing script tags in 'eventbeeticketwidget' parameters
- Multiple failed login attempts followed by successful contributor-level login
Network Indicators:
- HTTP requests with JavaScript payloads in URL parameters or POST data targeting WordPress
SIEM Query:
source="wordpress.log" AND ("eventbeeticketwidget" AND ("<script>" OR "javascript:" OR "onerror="))