CVE-2026-3371 Missing authorization in Tutor LMS – eLearning and online course solution
Authenticated subscribers can modify arbitrary course content structures in Tutor LMS due to missing authorization checks in AJAX handlers.
- 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-2026-3371?
CVE-2026-3371 is a medium-severity missing authorization vulnerability in themeum Tutor LMS – eLearning and online course solution, published on 11 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.9.7. This is due to missing authorization checks in the `save_course_content_order()` private method, which is called unconditionally by the `tutor_update_course_content_order` AJAX handler. While the handler's `content_parent` branch includes a `can_user_manage()` check, the `save_course_content_order()` call processes attacker-supplied `tutor_topics_lessons_sorting` JSON without any ownership or capability verification. This makes it possible for authenticated attackers with Subscriber-level access or above to detach lessons from topics, reorder course content, and reassign lessons between topics in any course, including admin-owned courses, by sending a crafted AJAX request with manipulated topic and lesson IDs.
Weakness: CWE-639
Which versions are affected by CVE-2026-3371?
How do I fix CVE-2026-3371?
No fix has been published for CVE-2026-3371 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-2026-3371 being exploited?
There is no known exploitation of CVE-2026-3371 in the wild and no public exploit code.
Sources
Also known as GHSA-g495-hm74-5j37.