What is CVE-2026-82850?

CVE-2026-82850 is a medium-severity vulnerability in Masteriyo Lms, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-09-24.

How severe is CVE-2026-82850?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in Masteriyo Lms

CVE-2026-82850

The Masteriyo LMS WordPress plugin before 3.4.2 does not restrict access to quiz answer keys, allowing any authenticated user, such as a student, to retrieve the correct answers for any quiz on the site, including quizzes in courses they are not enrolled in. The redaction that hides them is applied only to a fixed list of question types, so the answers to every other type are returned in full to anyone able to view the questions.

Vulnerability class: Information Disclosure

Published 2026-09-24 · last modified 2026-09-24.

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:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (2.7th percentile), scored 2026-09-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.7% 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

Masteriyo Lms

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

wpscan.com/vulnerability/b26150aa-9220-4eb3-a160-0f5301faacc7/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-82850?: CVE-2026-82850 is a medium-severity vulnerability in Masteriyo Lms, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-09-24.
How severe is CVE-2026-82850?: Medium severity. CVSS v3 base score is 4.3 out of 10.