CVE-2020-13688 : Security Advisory and Response

Drupal Core versions 8.8.X, 8.9.X, and 9.0.X are affected by a cross-site scripting vulnerability that could allow an attacker to exploit the way HTML is rendered for affected forms.

Understanding CVE-2020-13688

This CVE involves a cross-site scripting vulnerability in Drupal Core that affects multiple versions.

What is CVE-2020-13688?

A cross-site scripting vulnerability in Drupal Core allows attackers to exploit the rendering of HTML in affected forms.
Affected versions include Drupal Core 8.8.X prior to 8.8.10, 8.9.X prior to 8.9.6, and 9.0.X prior to 9.0.6.

The Impact of CVE-2020-13688

Attackers can potentially execute malicious scripts in the context of a victim's browser, leading to various security risks.

Technical Details of CVE-2020-13688

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from how HTML is processed in specific forms within Drupal Core.

Affected Systems and Versions

Drupal Core versions 8.8.X, 8.9.X, and 9.0.X are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the HTML rendering process for certain forms in Drupal Core.

Mitigation and Prevention

Protecting systems from CVE-2020-13688 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Drupal Core to versions 8.8.10, 8.9.6, or 9.0.6, which contain patches for the vulnerability.
Monitor and restrict user input to prevent malicious scripts from being injected.

Long-Term Security Practices

Regularly update Drupal Core and all associated modules to the latest secure versions.
Implement content security policies to mitigate cross-site scripting attacks.

Patching and Updates

Apply security patches provided by Drupal promptly to address known vulnerabilities.