CVE-2026-11773 Masteriyo LMS <= 2.2.1 - Missing Authorization to Authenticated (Student+) Arbitrary Course Announcement Modification
Authenticated students can modify arbitrary course announcements due to missing authorization checks in the Masteriyo LMS plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-11773?
CVE-2026-11773 is a medium-severity missing authorization vulnerability in Masteriyo LMS – LMS Course Builder, Quizzes & Certificates, published on 27 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Masteriyo LMS – LMS Course Builder, Quizzes & Certificates plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.2.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with student-level access and above, to modify the description (post content) of arbitrary course announcements authored by instructors or administrators.
Weakness: CWE-862
Which versions are affected by CVE-2026-11773?
How do I fix CVE-2026-11773?
No fix has been published for CVE-2026-11773 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-11773 being exploited?
There is no known exploitation of CVE-2026-11773 in the wild and no public exploit code.
Sources
Also known as GHSA-26q5-grw2-6qhj.