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How the CVE Works:
CVE-2025-31681 is a Missing Authorization vulnerability in Drupal’s Authenticator Login module (versions 0.0.0 to 2.0.6). Attackers exploit forceful browsing to bypass authentication checks, accessing restricted pages or actions without credentials. The flaw stems from improper session validation, allowing unauthorized users to hijack privileged workflows.
The module fails to enforce role-based access controls (RBAC) on critical endpoints, enabling direct URL manipulation. Attackers craft requests to admin panels or user-specific functions, leveraging default configurations. No CSRF or rate-limiting exacerbates the issue, making brute-force viable.
DailyCVE Form:
Platform: Drupal
Version: <2.0.6
Vulnerability: Forceful Browsing
Severity: Critical
Date: 06/02/2025
Prediction: Patch by 07/15/2025
What Undercode Say:
Analytics:
- Exploitability: High (Low skill, no prerequisites)
- Affected Components: `/admin/config/authenticator` endpoints
- Detection: Logs show 403->200 status shifts for unauthorized paths.
Exploit Command:
curl -X GET "http://target.com/admin/config/authenticator" -H "X-Forwarded-For: 127.0.0.1"
Mitigation Code (Apache):
<LocationMatch "/admin/config/authenticator"> Require valid-user AuthType Basic AuthName "Restricted" </LocationMatch>
Temporary Fix (Drupal):
1. Disable the module:
drush pm:disable authenticator_login -y
2. Apply manual RBAC patch:
// In hook_menu() implementation:
$items['admin/config/authenticator']['access callback'] = 'user_access';
$items['admin/config/authenticator']['access arguments'] = array('administer site configuration');
Detection Script (Python):
import requests
response = requests.get("http://target.com/admin/config/authenticator")
assert response.status_code != 200, "Vulnerable to CVE-2025-31681"
WAF Rule (ModSecurity):
SecRule REQUEST_URI "@streq /admin/config/authenticator" \ "id:1001,deny,status:403,msg:'CVE-2025-31681 Block'"
Patch Verification:
drush pm:list | grep authenticator_login | grep 2.0.6
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
