Masteriyo LMS exposes learner enrolment records without authorization
Masteriyo LMS versions 1.3.1 to before 3.4.0 return course-enrolment records through the REST API without authorization. Unauthenticated callers can enumerate sequential record IDs to read learner enrolment status, timestamps, and course progress. A related missing check lets enrolled users read other learners' records.
- Component
- Masteriyo LMS
- Plugin slug
masteriyo-lms- Affected
- 1.3.1 to < 3.4.0
- Safe version
3.4.0- Published
- Sep 09, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Sep 09, 2026 and is one of 7 known issues for this plugin.
Update, patch or deactivate.
Update Masteriyo LMS to 3.4.0 or later. The authoritative record identifies this release as outside the affected range.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The Masteriyo LMS WordPress plugin before 3.4.0 does not perform any authorization check before returning a course enrolment record over its REST API, allowing unauthenticated users to read any learner's enrolment status, timestamps and course-progress data by walking sequential record identifiers. A related gap lets any enrolled user retrieve other learners' enrolment records as well.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N