CVE-2025-67592
📋 TL;DR
This CVE describes a Missing Authorization vulnerability in the My Calendar WordPress plugin that allows attackers to exploit incorrectly configured access control security levels. It affects all WordPress sites running My Calendar plugin versions up to and including 3.6.16, potentially allowing unauthorized access to calendar functionality.
💻 Affected Systems
- WordPress My Calendar 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 modify calendar events, delete content, or access administrative calendar functions without proper authorization, potentially disrupting website functionality or defacing content.
Likely Case
Unauthorized users could view or modify calendar events they shouldn't have access to, potentially altering event details, times, or descriptions.
If Mitigated
With proper access controls and authentication requirements, impact would be limited to authorized users only performing intended actions.
🎯 Exploit Status
Exploitation requires understanding of WordPress plugin structure and access control mechanisms, but is straightforward once identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: > 3.6.16
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find My Calendar plugin. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable My Calendar Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate my-calendar
Restrict Access via .htaccess
linuxAdd access restrictions to calendar-related directories
# Add to .htaccess in wp-content/plugins/my-calendar/
Order Deny,Allow
Deny from all
Allow from 127.0.0.1
🧯 If You Can't Patch
- Implement strict role-based access controls for calendar functions
- Monitor and audit all calendar-related activity for unauthorized changes
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > My Calendar version numberCheck Version:
wp plugin list --name=my-calendar --field=versionVerify Fix Applied:
Verify My Calendar plugin version is > 3.6.16 in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unauthorized POST requests to /wp-admin/admin-ajax.php with calendar-related actions
- Unexpected calendar modifications from unprivileged users
Network Indicators:
- Unusual pattern of requests to my-calendar plugin endpoints from unauthorized IPs
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-admin/admin-ajax.php") AND (action="my_calendar_*") AND user_role!="administrator"