Auth bypass in Masterstudy Lms WordPress Plugin
CVE-2026-88847
The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50 does not verify that a user is enrolled in a course before recording lesson completions against it, allowing any authenticated user, such as a subscriber, to create course progress records for courses they have no access to.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.001 (2.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
- Masterstudy Lms WordPress Plugin
Weakness classification (CWE)
References
- wpscan.com/vulnerability/c42e9b3a-5a0d-4e16-b18a-4184c09bcb5a/ (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-88847?
- CVE-2026-88847 is a medium-severity vulnerability in Masterstudy Lms WordPress Plugin, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-09-24.
- How severe is CVE-2026-88847?
- Medium severity. CVSS v3 base score is 4.3 out of 10.