WordPress security changelog
MEDIUM CVE-2026-6965 Deferred

Tutor LMS – eLearning and online course solution: A security weakness

Tutor LMS – eLearning and online course solution is affected by a security weakness. Exploitation requires an authenticated WordPress account. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is <= 3.9.9.

CVE / CNA score 5.3 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Tutor LMS – eLearning and online course solution
Plugin slug
tutor
Affected
<= 3.9.9
Safe version
> 3.9.9
Published
May 13, 2026
Weakness
CWE-639 — Authorization Bypass Through User-Controlled Key

This CVE was published May 13, 2026 and is one of 43 known issues for this plugin.

What to do

Update, patch or deactivate.

Update Tutor LMS – eLearning and online course solution to a release after 3.9.9, or disable and remove it until a fixed version is available.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to and including 3.9.9. This is due to the `get_course_id_by()` function unconditionally trusting the user-supplied `course` GET parameter as the authoritative course ID for content ownership lookups, which is then consumed by `can_user_manage()`, the plugin's sole authorization gate for instructor-level operations, causing it to evaluate instructor membership against the attacker-controlled course rather than the course that actually owns the target content object. This makes it possible for authenticated attackers, with instructor-level access and above, to perform unauthorized operations on any other instructor's course content, including permanently deleting lessons, assignments, quizzes (with cascading deletion of all student attempt data), topics, announcements, and Q&A threads, as well as creating or modifying lessons, topics, and announcements in victim courses, manipulating student quiz grades, and reading unpublished lesson and quiz content.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

Primary and upstream sources