CVE-2026-12274 Tutor LMS < 3.9.13 - Instructor+ Arbitrary Post Overwrite via IDOR
Instructors can overwrite any site post or page, including admin content, due to missing authorization checks in the content builder.
- 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-2026-12274?
CVE-2026-12274 is a medium-severity missing authorization vulnerability in Unknown Tutor LMS, published on 13 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Tutor LMS WordPress plugin before 3.9.13 does not verify that the requesting user is allowed to edit a target post before overwriting it in one of its content-builder save handlers, authorizing the request only against an unrelated identifier, allowing authenticated users with instructor-level access to overwrite and take over any post or page on the site, including those owned by administrators.
Which versions are affected by CVE-2026-12274?
How do I fix CVE-2026-12274?
No fix has been published for CVE-2026-12274 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-2026-12274 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12274 exists.
Sources
Also known as GHSA-c7pm-q6w7-5993.