Auth bypass in Masterstudy Lms WordPress Plugin

CVE-2026-88844

The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50 does not verify that the requesting user owns the course before returning its enrolled-student data, allowing users with the MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50's Instructor role to disclose the names and email addresses of students enrolled in other instructors' courses.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (22.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-88844: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Masterstudy Lms WordPress Plugin

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-88844?
CVE-2026-88844 is a low-severity vulnerability in Masterstudy Lms WordPress Plugin, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 2.7/10. Published 2026-09-18.
How severe is CVE-2026-88844?
Low severity. CVSS v3 base score is 2.7 out of 10.