What’s Vulnerable › Vulnerabilities
CVE-2026-82850: Masteriyo LMS < 3.4.2 - Subscriber+ Quiz Answer Key Disclosure
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-24 · updated 2026-09-24
- Weakness: CWE-200
Description
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.
Affected products
- Masteriyo LMS: before 3.4.2 — fixed in 3.4.2
How to fix
Upgrade to a fixed version: Masteriyo LMS 3.4.2. Check the vendor advisory for mitigations.
References
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