CVE-2026-13443 Tutor LMS <= 3.9.13 - Authenticated (Author+) Stored Cross-Site Scripting via Lesson Attachment Title
Authenticated attackers with author-level access can inject arbitrary scripts via lesson attachment titles, potentially leading to session hijacking or malicious actions.
- 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-2026-13443?
CVE-2026-13443 is a medium-severity cross-site scripting vulnerability in themeum Tutor LMS – eLearning and online course solution, published on 1 Jul 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 Stored Cross-Site Scripting via Lesson Attachment Title in all versions up to, and including, 3.9.13 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2026-13443?
How do I fix CVE-2026-13443?
No fix has been published for CVE-2026-13443 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-13443 being exploited?
There is no known exploitation of CVE-2026-13443 in the wild and no public exploit code.
Sources
Also known as GHSA-78vh-g76h-gmfr.