CVE-2020-13676 Explained : Impact and Mitigation

Drupal Core versions 8.9.x, 9.1.x, and 9.2.x are affected by improper access control in the QuickEdit module, potentially leading to unauthorized disclosure of field data.

Understanding CVE-2020-13676

This CVE identifies a security vulnerability in Drupal Core versions 8.9.x, 9.1.x, and 9.2.x related to the QuickEdit module.

What is CVE-2020-13676?

The QuickEdit module in Drupal Core fails to adequately verify access to fields, allowing unauthorized disclosure of field data under specific conditions. This vulnerability impacts sites with the QuickEdit module installed.

The Impact of CVE-2020-13676

The vulnerability can result in unintended exposure of sensitive field data to unauthorized users, potentially leading to data breaches or privacy violations.

Technical Details of CVE-2020-13676

Drupal Core versions 8.9.x, 9.1.x, and 9.2.x are susceptible to this security flaw.

Vulnerability Description

The QuickEdit module lacks proper access control checks, enabling unauthorized users to view field data without permission.

Affected Systems and Versions

Drupal Core 8.9.x (less than 8.9.19)
Drupal Core 9.1.x (less than 9.1.13)
Drupal Core 9.2.x (less than 9.2.6)

Exploitation Mechanism

Attackers can exploit this vulnerability by accessing fields through the QuickEdit module without the necessary permissions, potentially exposing sensitive data.

Mitigation and Prevention

To address CVE-2020-13676, follow these steps:

Immediate Steps to Take

Disable the QuickEdit module if not essential for site functionality
Implement least privilege access controls to restrict field visibility

Long-Term Security Practices

Regularly monitor and audit user access and permissions
Stay informed about Drupal security advisories and updates

Patching and Updates

Apply the latest security patches and updates provided by Drupal to mitigate the vulnerability