What’s Vulnerable › Vulnerabilities
CVE-2026-82849: Masteriyo LMS < 3.4.2 - Subscriber+ Arbitrary User Course Progress Disclosure via IDOR
- 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-639
Description
The Masteriyo LMS WordPress plugin before 3.4.2 does not verify that the user making the request owns the course-progress records being returned, allowing any authenticated user, such as a self-registered subscriber, to read another user's learning activity. The ownership check it applies is skipped whenever the requested account is not named with a non-zero value, in which case the records of every learner on the site are returned at once.
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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