CVE-2026-82850mediumCWE-200

CVE-2026-82850: medium-severity vulnerability in Masteriyo LMS

Masteriyo LMS < 3.4.2 - Subscriber+ Quiz Answer Key Disclosure

Published

Follow this CVE+ Monitor Masteriyo - LMS

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 4.3epss 0.2%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Affected products
Unknown · Masteriyo LMS
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Masteriyo LMS

In the same product, most dangerous first.

CVE-2026-82845CRITICALMasteriyo LMS < 3.4.1 - Subscriber+ PHP Object InjectionEPSS 0.6%CVE-2026-82847MEDIUMMasteriyo LMS < 3.4.1 - Instructor+ Stored XSS via Course HighlightsEPSS 0.4%CVE-2026-82846MEDIUMMasteriyo LMS 1.18.0 - 2.3.3 - Instructor+ Stored XSS via Course Custom FieldsEPSS 0.4%CVE-2026-13332CRITICALMasteriyo LMS < 2.3.1 - Unauthenticated Arbitrary User Session Termination (Denial of Service)EPSS 0.4%CVE-2026-82848MEDIUMMasteriyo LMS 1.3.1 - 2.3.3 - Unauthenticated Course Enrollment DisclosureEPSS 0.3%CVE-2026-82851LOWMasteriyo LMS 1.14.0 - 3.4.0 - Instructor+ Arbitrary Post Disclosure via IDOREPSS 0.3%