How severe is CVE-2020-26876?

CVE-2020-26876 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-26876 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26876?

CVE-2020-26876 affects Wpcoursesplugin Wp-courses. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26876?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-26876 published?

CVE-2020-26876 was published on 2020-10-07 and last updated on 2026-06-17.

CVE-2020-26876

CVE-2020-26876 is a high-severity vulnerability in Wpcoursesplugin Wp-courses with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Wpcoursesplugin Wp-courses
Published: 2020-10-07
Last modified: 2026-06-17

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).

Frequently asked questions

What is CVE-2020-26876?: 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).
How severe is CVE-2020-26876?: CVE-2020-26876 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-26876 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26876?: CVE-2020-26876 affects Wpcoursesplugin Wp-courses. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26876?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-26876 published?: CVE-2020-26876 was published on 2020-10-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wpcoursesplugin:wp-courses:*:*:*:*:*:wordpress:*:*

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