Auth bypass in Masterstudy Lms
CVE-2026-88848
The MasterStudy LMS WordPress plugin from 1.9 before 3.7.50 does not verify that a course a member asks to enrol in is covered by their membership plan, nor that the plan identifier submitted with the request is one they actually hold, allowing any member to enrol themselves into restricted paid courses outside their plan and beyond the number of courses it entitles them to.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.001 (1.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.6% 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
Weakness classification (CWE)
References
- wpscan.com/vulnerability/13258868-aeed-4664-8b38-ffb1f802895a/ (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-88848?
- CVE-2026-88848 is a medium-severity vulnerability in Masterstudy Lms, classified under Incorrect Authorization. CVSS score: 4.2/10. Published 2026-09-25.
- How severe is CVE-2026-88848?
- Medium severity. CVSS v3 base score is 4.2 out of 10.