CVE-2020-13688 Drupal Core Cross-site scripting vulnerability

What is CVE-2020-13688?

CVE-2020-13688 is a medium-severity cross-site scripting vulnerability in Drupal Drupal, published on 11 Jun 2021. 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

Cross-site scripting vulnerability in l Drupal Core allows an attacker could 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-2020-13688?

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

Products include Drupal Drupal.

How do I fix CVE-2020-13688?

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-2020-13688 being exploited?

There is no known exploitation of CVE-2020-13688 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-2020-13688, DRUPAL-CORE-2020-009, GHSA-qf2g-mrrx-rr5p.