CVE-2025-12787
📋 TL;DR
This vulnerability allows unauthenticated attackers to cancel arbitrary bookings in the Hydra Booking WordPress plugin. Attackers can brute-force cancellation tokens due to insufficient randomness and a shared nonce. All WordPress sites using vulnerable plugin versions are affected.
💻 Affected Systems
- Hydra Booking — Appointment Scheduling & Booking Calendar plugin for WordPress
⚠️ 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 cancellation of all bookings causing business disruption, financial loss, and reputational damage
Likely Case
Targeted cancellation of specific bookings causing customer dissatisfaction and operational issues
If Mitigated
Limited impact with monitoring and rate limiting in place
🎯 Exploit Status
Exploitation requires brute-forcing cancellation tokens but is straightforward for attackers
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.28
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find Hydra Booking plugin
4. Click 'Update Now' if available
5. If manual update needed, download version 1.1.28 from WordPress.org
6. Deactivate plugin, upload new version, reactivate
🔧 Temporary Workarounds
Disable vulnerable AJAX endpoint
allBlock access to the tfhb_meeting_form_cencel AJAX endpoint via web application firewall or .htaccess
# Add to .htaccess:
RewriteCond %{QUERY_STRING} action=tfhb_meeting_form_cencel [NC]
RewriteRule ^wp-admin/admin-ajax\.php$ - [F,L]
Implement rate limiting
linuxLimit requests to admin-ajax.php to prevent brute force attacks
# Using mod_evasive for Apache:
DOSPageCount 2
DOSPageInterval 1
DOSBlockingPeriod 10
🧯 If You Can't Patch
- Deactivate Hydra Booking plugin immediately
- Implement web application firewall with brute force protection
🔍 How to Verify
Check if Vulnerable:
Check plugin version in WordPress admin panel under Plugins → Installed PluginsCheck Version:
wp plugin list --name='Hydra Booking' --field=versionVerify Fix Applied:
Confirm plugin version is 1.1.28 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /wp-admin/admin-ajax.php with action=tfhb_meeting_form_cencel
- Failed booking cancellation attempts from same IP
Network Indicators:
- Brute force patterns to admin-ajax.php endpoint
- Unusual cancellation activity
SIEM Query:
source="web_logs" AND uri="/wp-admin/admin-ajax.php" AND query="action=tfhb_meeting_form_cencel" | stats count by src_ip🔗 References
- https://plugins.trac.wordpress.org/changeset/3392864/hydra-booking/tags/1.1.28/app/Shortcode/HydraBookingShortcode.php?old=3392467&old_path=hydra-booking%2Ftags%2F1.1.27%2Fapp%2FShortcode%2FHydraBookingShortcode.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/490dd84f-7c03-43c7-b4e1-167fa2b15c03?source=cve
