CVE-2026-16563 Academy LMS < 3.8.3 - Subscriber+ Arbitrary Lesson Content Disclosure via lessons REST Endpoint
Subscribers can access arbitrary lesson content, including paid and unpublished lessons, due to missing authorization checks in the REST API.
- 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-2026-16563?
CVE-2026-16563 is a medium-severity missing authorization vulnerability in Unknown Academy LMS, published on 3 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Academy LMS WordPress plugin before 3.8.3 does not verify course enrollment or lesson publication status when returning a single lesson through its REST API, allowing users with a self-service student (Subscriber-level) account to disclose the content of arbitrary lessons, including lessons of paid courses they are not enrolled in and unpublished (draft, pending, private) lessons.
Weakness: CWE-284
Which versions are affected by CVE-2026-16563?
How do I fix CVE-2026-16563?
No fix has been published for CVE-2026-16563 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-2026-16563 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16563 exists.
Sources
Also known as GHSA-9988-37r6-j7j6.