CVE-2026-85571 Tutor LMS 4.0.5 - 4.1.0 - Instructor+ Arbitrary Post Reparenting via IDOR
Instructors can reassign any post to their own courses, stealing content and hiding others' posts due to missing ownership checks.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85571?
CVE-2026-85571 is a medium-severity missing authorization vulnerability in Unknown Tutor LMS, published on 10 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Tutor LMS WordPress plugin before 4.1.1 does not verify that the posts named in its course content ordering requests belong to a course the requester manages, allowing users with instructor level access to reassign the parent of any post on the site, taking other instructors' course content into their own courses and making arbitrary published content unreachable.
Weakness: CWE-639
Which versions are affected by CVE-2026-85571?
How do I fix CVE-2026-85571?
No fix has been published for CVE-2026-85571 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-2026-85571 being exploited?
There is no known exploitation of CVE-2026-85571 in the wild and no public exploit code.
Sources
Also known as GHSA-p4r6-qc79-jj5f.