Overview
A critical security vulnerability, identified as CVE-2025-13081, has been discovered in Drupal core. This vulnerability, classified as an Improperly Controlled Modification of Dynamically-Determined Object Attributes, can lead to Object Injection, potentially allowing attackers to execute arbitrary code on vulnerable Drupal installations. It is crucial for all Drupal site administrators to apply the necessary patches immediately.
Technical Details
CVE-2025-13081 stems from a flaw in how Drupal core handles the modification of object attributes that are dynamically determined. Specifically, insufficient validation allows attackers to inject malicious data that can be used to manipulate object properties in unintended ways. This can lead to the instantiation of arbitrary classes and the execution of malicious code. The vulnerability affects Drupal versions:
- Drupal core: from 8.0.0 before 10.4.9
- Drupal core: from 10.5.0 before 10.5.6
- Drupal core: from 11.0.0 before 11.1.9
- Drupal core: from 11.2.0 before 11.2.8
Object injection vulnerabilities are notoriously dangerous because they allow attackers to bypass security mechanisms and directly influence the execution flow of the application.
CVSS Analysis
Currently, the CVSS score for CVE-2025-13081 is N/A. However, due to the nature of Object Injection vulnerabilities and the potential for Remote Code Execution (RCE), this vulnerability should be considered high-risk. We strongly advise immediate action, irrespective of the current CVSS score. A more detailed CVSS score will likely be published soon as the vulnerability is analyzed further.
Possible Impact
Successful exploitation of CVE-2025-13081 could have severe consequences, including:
- Remote Code Execution (RCE): An attacker could execute arbitrary code on the server, gaining full control of the Drupal installation.
- Data Breach: Sensitive data stored in the Drupal database could be accessed and stolen.
- Website Defacement: The attacker could modify the website’s content, causing reputational damage.
- Denial of Service (DoS): The attacker could crash the server, rendering the website unavailable.
Mitigation and Patch Steps
The most effective way to mitigate CVE-2025-13081 is to upgrade your Drupal core to a patched version. Follow these steps:
- Back Up Your Website: Before applying any updates, create a full backup of your website, including the database and files.
- Update Drupal Core: Upgrade to the following versions or later:
- 10.4.9
- 10.5.6
- 11.1.9
- 11.2.8
You can update Drupal core through the Drupal admin interface or using Composer.
- Verify the Update: After the update, verify that your website is functioning correctly and that the patch has been applied successfully.
- Monitor Your Logs: Keep an eye on your server logs for any suspicious activity.
If upgrading is not immediately possible, consider implementing temporary workarounds, such as carefully validating all user input and limiting access to sensitive resources. However, these are only temporary measures and should not be considered a substitute for patching.
