CVE-2025-66307
📋 TL;DR
This vulnerability in Grav's admin plugin allows attackers to enumerate valid usernames and discover associated email addresses through the 'Forgot Password' functionality. Attackers can leverage this information for targeted attacks like password spraying and phishing. All Grav installations using the admin plugin before version 1.11.0-beta.1 are affected.
💻 Affected Systems
- Grav CMS with Admin Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers build comprehensive user directories, execute targeted password spraying attacks leading to account compromise, and conduct sophisticated phishing campaigns using verified email addresses.
Likely Case
Attackers enumerate administrative users, discover their email addresses, and use this information for targeted phishing or password spraying against the Grav admin interface.
If Mitigated
With proper network segmentation and access controls, impact is limited to information disclosure without direct system compromise.
🎯 Exploit Status
Exploitation requires only HTTP requests to the /admin/forgot endpoint and observing response differences. No authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.11.0-beta.1
Vendor Advisory: https://github.com/getgrav/grav/security/advisories/GHSA-q3qx-cp62-f6m7
Restart Required: No
Instructions:
1. Update Grav admin plugin to version 1.11.0-beta.1 or later. 2. Use composer update getgrav/grav-plugin-admin or download from GitHub. 3. Clear cache if necessary.
🔧 Temporary Workarounds
Disable Admin Plugin
allTemporarily disable the admin plugin to prevent exploitation of the forgot password endpoint.
Remove or rename the /user/plugins/admin directory
Web Application Firewall Rule
allBlock or rate-limit requests to /admin/forgot endpoint.
🧯 If You Can't Patch
- Implement network-level restrictions to limit access to /admin endpoints to trusted IP addresses only.
- Enable multi-factor authentication for all admin accounts to mitigate password spraying risks.
🔍 How to Verify
Check if Vulnerable:
Test the /admin/forgot endpoint with valid and invalid usernames. If responses differ (e.g., timing, error messages), the system is vulnerable.Check Version:
Check composer.lock for "getgrav/grav-plugin-admin" version or inspect plugin directory version file.Verify Fix Applied:
After patching, test the /admin/forgot endpoint - responses should be identical regardless of username validity.📡 Detection & Monitoring
Log Indicators:
- Multiple failed requests to /admin/forgot with different usernames
- Unusual patterns of forgot password attempts
Network Indicators:
- High volume of POST requests to /admin/forgot endpoint
- Requests from unusual IP addresses to admin interface
SIEM Query:
source="web_logs" AND uri="/admin/forgot" AND (status=200 OR status=400) | stats count by src_ip, user_agent