CVE-2020-13677 Drupal core access bypass vulnerability

What is CVE-2020-13677?

CVE-2020-13677 is a high-severity missing authorization vulnerability in Drupal Drupal, published on 11 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Under some circumstances, the Drupal core JSON:API module does not properly restrict access to certain content, which may result in unintended access bypass. Sites that do not have the JSON:API module enabled are not affected.

Weakness: CWE-284

Which versions are affected by CVE-2020-13677?

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-2020-13677?

Upgrade drupal/core to a fixed version for your release line: 8.9.19, 9.1.13 or 9.2.6.

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

Is CVE-2020-13677 being exploited?

There is no known exploitation of CVE-2020-13677 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-2020-13677, DRUPAL-CORE-2021-010, GHSA-3xr3-phjp-g6p2.