CVE-2020-13665

Name: CVE-2020-13665
Creator: NVD / NIST
Published: 2021-05-05T15:15:08.26+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.27%

Last modified Jun 17, 2026

CVE-2020-13665 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 1.27% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.27%

66.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Drupal	Drupal	>= 8.8.0, < 8.8.8
Drupal	Drupal	>= 8.9.0, < 8.9.1
Drupal	Drupal	>= 9.0.0, < 9.0.1

References

https://www.drupal.org/sa-core-2020-006Vendor Advisory
https://www.drupal.org/sa-core-2020-006Vendor Advisory

Timeline

Published: May 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13665?

How severe is CVE-2020-13665?

CVE-2020-13665 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.27% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13665?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-13665?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST