Masteriyo exposes a low-privilege authorization flaw
Masteriyo - LMS through 3.4.0 has a broken-access-control flaw. The vector requires no user interaction and rates integrity impact as low, but the endpoint, action, parameter, protected object, and resulting change are not disclosed.
- Component
- Masteriyo - LMS
- Plugin slug
learning-management-system- Affected
- n/a through 3.4.0
- Safe version
3.4.1- Published
- Sep 11, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Sep 11, 2026 and is one of 19 known issues for this plugin.
Update, patch or deactivate.
Update Masteriyo - LMS to 3.4.1 or later. The authoritative affected data explicitly marks 3.4.1 unaffected. The application-level fix must authenticate the caller where required and enforce the appropriate capability and object-level authorization before the affected operation.
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
Subscriber Broken Access Control in Masteriyo - LMS <= 3.4.0 versions.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N