CVE-2020-26876

Name: CVE-2020-26876
Creator: NVD / NIST
Published: 2020-10-07T17:15:15.863+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 9.20%

Last modified Jun 17, 2026

CVE-2020-26876 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The wp-courses plugin through 2.0.27 for WordPress allows remote attackers to bypass the intended payment step (for course videos and materials) by using the /wp-json REST API, as exploited in the wild in September 2020. This occurs because show_in_rest is enabled for custom post types (e.g., /wp-json/wp/v2/course and /wp-json/wp/v2/lesson exist).. EPSS estimates a 9.20% chance of exploitation in the next 30 days.

Description

The wp-courses plugin through 2.0.27 for WordPress allows remote attackers to bypass the intended payment step (for course videos and materials) by using the /wp-json REST API, as exploited in the wild in September 2020. This occurs because show_in_rest is enabled for custom post types (e.g., /wp-json/wp/v2/course and /wp-json/wp/v2/lesson exist).

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

9.20%

94.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Wpcoursesplugin	Wp-Courses	<= 2.0.27

References

https://plugins.trac.wordpress.org/changeset/2388997Third Party Advisory
https://plugins.trac.wordpress.org/changeset/2389243Third Party Advisory
https://www.redtimmy.com/critical-information-disclosure-on-wp-courses-plugin-exposes-private-course-videos-and-materials/Exploit, Third Party Advisory
https://plugins.trac.wordpress.org/changeset/2388997Third Party Advisory
https://plugins.trac.wordpress.org/changeset/2389243Third Party Advisory
https://www.redtimmy.com/critical-information-disclosure-on-wp-courses-plugin-exposes-private-course-videos-and-materials/Exploit, Third Party Advisory

Timeline

Published: Oct 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26876?

How severe is CVE-2020-26876?

CVE-2020-26876 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 9.20% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26876?

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-2020-26876?

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

Scan your code now

Source: NVD / NIST