CVE-2025-11517
📋 TL;DR
The Event Tickets and Registration WordPress plugin has a payment bypass vulnerability that allows unauthenticated attackers to obtain paid tickets without payment. This affects all WordPress sites using this plugin up to version 5.26.5, causing direct revenue loss for event organizers.
💻 Affected Systems
- Event Tickets and Registration 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
Mass exploitation leading to complete revenue loss for paid events, potential event capacity overflow, and reputational damage to organizers.
Likely Case
Opportunistic attackers obtaining free access to paid events, causing direct financial loss proportional to ticket prices and attendance.
If Mitigated
Minimal impact if patched immediately, with only brief exposure window for exploitation.
🎯 Exploit Status
Simple REST API endpoint exploitation requiring no authentication. Attackers can craft HTTP POST requests to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.26.6
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3378214/event-tickets/tags/5.26.6/src/Tickets/Commerce/Gateways/Free/REST/Order_Endpoint.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins. 3. Find 'Event Tickets and Registration'. 4. Click 'Update Now' to version 5.26.6 or higher. 5. Verify update completes successfully.
🔧 Temporary Workarounds
Disable vulnerable REST endpoint
allBlock access to the vulnerable /wp-json/tribe/tickets/v1/commerce/free/order endpoint using web server configuration or security plugins.
# Apache: RewriteRule ^wp-json/tribe/tickets/v1/commerce/free/order - [F,L]
# Nginx: location ~* ^/wp-json/tribe/tickets/v1/commerce/free/order { return 403; }
🧯 If You Can't Patch
- Disable the Event Tickets plugin temporarily until patching is possible.
- Implement web application firewall rules to block requests to the vulnerable endpoint.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Event Tickets and Registration. If version is 5.26.5 or lower, you are vulnerable.Check Version:
wp plugin list --name='event-tickets' --field=versionVerify Fix Applied:
After updating, verify plugin version shows 5.26.6 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /wp-json/tribe/tickets/v1/commerce/free/order endpoint
- Multiple ticket purchases with $0 payment amounts
- Unusual spike in ticket registrations from single IPs
Network Indicators:
- POST requests to vulnerable endpoint without authentication
- Traffic patterns showing ticket purchases without payment processing
SIEM Query:
source="web_logs" AND uri_path="/wp-json/tribe/tickets/v1/commerce/free/order" AND http_method="POST"