PatchTheCVECVE-2020-26876: The wp-courses plugin through 2.0.27 for WordPress allows remote attackers to bypass the intended payment step
CVE-2020-26876 is a high-severity flaw (CVSS 7.5) affecting wp-courses. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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).
Why this priority
- High severity
- EPSS top 4%: very likely to be exploited
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 10.6% (top 4%) |
| CISA exploited list | No |
| Weakness | CWE-306 |
| Published | 2020-10-07 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Nuclei scan template: WordPress WP Courses Plugin Information Disclosure
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-26876?
wp-courses: upgrade to newer than 2.0.27. Exact commands for each OS are on this page.
Is CVE-2020-26876 being exploited?
CVE-2020-26876 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-26876 affect?
CVE-2020-26876 affects wp-courses. Severity is high (CVSS 7.5). 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
How urgent is CVE-2020-26876?
Priority 60/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action