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Vulnerability record · CVE-2020-26876 · published 7 October 2020

CVE-2020-26876: Wpcoursesplugin wp-courses missing authentication for critical function vulnerability

Wpcoursesplugin · Wp Courses

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).

7.5 CVSS 3.1 High EPSS 11% · top 4.4% CWE-306 · Missing authentication for critical function
7.5CVSS 3.1 base score, v2 5.0
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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).

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2020-26876), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.