CVE-2026-12271 Tutor LMS < 3.9.13 - Subscriber+ Arbitrary Quiz Attempt Modification via IDOR
Authenticated users can modify other students' quiz attempts and results due to missing ownership verification in Tutor LMS.
- 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-2026-12271?
CVE-2026-12271 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 ownership of the targeted quiz attempt before writing to it, allowing authenticated users with subscriber-level access and above to modify and force-complete other students' quiz attempts, overwriting their recorded marks and pass/fail result.
Which versions are affected by CVE-2026-12271?
How do I fix CVE-2026-12271?
No fix has been published for CVE-2026-12271 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-2026-12271 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12271 exists.
Sources
Also known as GHSA-pqgf-9jm9-v6q5.