Overview
A security vulnerability, identified as CVE-2025-13083, has been discovered in Drupal core. This vulnerability involves the use of a web browser cache that contains sensitive information, leading to potential exploitation of incorrectly configured access control security levels. It’s crucial to update your Drupal installation to a patched version to mitigate this risk.
Technical Details of CVE-2025-13083
The vulnerability stems from how Drupal core handles caching of certain data within web browsers. When access control configurations are not properly implemented or understood, sensitive information can be inadvertently cached and subsequently exposed to unauthorized users. This cached information could include user details, configuration settings, or other protected data, allowing an attacker to potentially escalate privileges or gain unauthorized access to the Drupal site.
Specifically, the vulnerability affects Drupal core versions:
- From 8.0.0 before 10.4.9
- From 10.5.0 before 10.5.6
- From 11.0.0 before 11.1.9
- From 11.2.0 before 11.2.8
CVSS Analysis
Currently, the severity and CVSS score are listed as N/A. While a score isn’t yet available, the description clearly indicates a potential for sensitive data exposure and access control bypass, suggesting a potentially high-impact vulnerability. It’s important not to dismiss this vulnerability solely based on the lack of a score and to apply the necessary patches promptly.
Possible Impact
The potential impact of CVE-2025-13083 is significant. Successful exploitation could lead to:
- Data Breach: Exposure of sensitive user information and site configurations.
- Privilege Escalation: Attackers gaining unauthorized access to higher-level accounts and administrative functions.
- Site Defacement: Alteration or destruction of website content.
- Malware Injection: Introduction of malicious code into the website.
Even without a concrete CVSS score, the possibility of these impacts warrants immediate action.
Mitigation and Patch Steps
The most effective way to mitigate this vulnerability is to update your Drupal core installation to a patched version. Follow these steps:
- Backup your Drupal site: Before applying any updates, create a complete backup of your database and files.
- Update Drupal core: Upgrade to the latest patched version based on your current branch:
- Update to 10.4.9 or later if you’re on the 10.4.x branch.
- Update to 10.5.6 or later if you’re on the 10.5.x branch.
- Update to 11.1.9 or later if you’re on the 11.1.x branch.
- Update to 11.2.8 or later if you’re on the 11.2.x branch.
You can perform the update via the Drupal administrative interface, Drush, or Composer. Refer to the official Drupal documentation for detailed instructions.
- Clear Drupal Cache: After updating, clear all Drupal caches.
- Monitor Logs: Keep an eye on your server logs for any suspicious activity.
