CVE-2026-16759 Tutor LMS <= 4.0.5 - Unauthenticated Remote Code Execution via 'template' and 'data' POST Parameters
Unauthenticated attackers can execute arbitrary zero-argument PHP functions and create subscriber accounts via unsanitized parameters in Tutor LMS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16759?
CVE-2026-16759 is a medium-severity code injection vulnerability in themeum Tutor LMS – eLearning and online course solution, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Remote Code Execution limited to zero-argument function invocation in all versions up to, and including, 4.0.5 via the tutor_course_filter_ajax AJAX action. This is due to missing authorization on the handler combined with unsanitized array keys being passed to extract() inside tutor_load_template(), allowing attacker-controlled POST data to overwrite the local $template variable and, in the resulting templates/single-content-loader.php template, the $method_map and $context variables invoked at $method_map[$context](). This makes it possible for unauthenticated attackers to call an arbitrary zero-argument PHP function server-side and, via WordPress core edit_user(), to create a persistent subscriber-level account from request parameters.
Weakness: CWE-74
Which versions are affected by CVE-2026-16759?
How do I fix CVE-2026-16759?
No fix has been published for CVE-2026-16759 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-16759 being exploited?
There is no known exploitation of CVE-2026-16759 in the wild and no public exploit code.
Sources
Also known as GHSA-hj5q-894h-jcm9.