CVE-2020-13668 Access bypass in Drupal Core 8/9

What is CVE-2020-13668?

CVE-2020-13668 is a medium-severity cross-site scripting vulnerability in Drupal Drupal, published on 11 Feb 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Access Bypass vulnerability in Drupal Core allows for an attacker to leverage the way that HTML is rendered for affected forms in order to exploit the vulnerability. This issue affects: Drupal Core 8.8.x versions prior to 8.8.10; 8.9.x versions prior to 8.9.6; 9.0.x versions prior to 9.0.6.

Weakness: CWE-79

Which versions are affected by CVE-2020-13668?

13 open source packages ship an affected version, including drupal/core, drupal and drupal/drupal. It affects 1 product.

Products include Drupal Drupal.

How do I fix CVE-2020-13668?

Upgrade drupal/core to a fixed version for your release line: 8.8.10, 8.9.6 or 9.0.6.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2020-13668 being exploited?

There is no known exploitation of CVE-2020-13668 in the wild and no public exploit code.

Other vulnerabilities in Drupal Drupal

• CVE-2026-9082 Drupal Core SQL Injection Exploited Critical 9.8
• CVE-2020-13671 Drupal core Un-restricted Upload of File Exploited High 8.8
• CVE-2019-6340 Drupal Core Remote Code Execution Exploited High 8.1
• CVE-2009-3352 Other in n/a Critical 10.0
• CVE-2024-55636 Drupal core - Less critical - Gadget chain - SA-CORE-2024-006 Critical 9.8

All Drupal Drupal vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-drupal-2020-13668, GHSA-m6q5-wv4x-fv6h.