CVE-2020-13665 Drupal Core Access bypass vulnerability

What is CVE-2020-13665?

CVE-2020-13665 is a critical missing authorization vulnerability in Drupal Drupal, published on 5 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Access bypass vulnerability in Drupal Core allows JSON:API when JSON:API is in read/write mode. Only sites that have the read_only set to FALSE under jsonapi.settings config are vulnerable. This issue affects: Drupal Drupal Core 8.8.x versions prior to 8.8.8; 8.9.x versions prior to 8.9.1; 9.0.x versions prior to 9.0.1.

Which versions are affected by CVE-2020-13665?

14 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-2020-13665?

Upgrade drupal/core to a fixed version for your release line: 8.8.8, 8.9.1 or 9.0.1.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-13665 being exploited?

There is no known exploitation of CVE-2020-13665 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-2020-13665, DRUPAL-CORE-2020-006, GHSA-wxqp-jwc9-g39x.