CVE-2026-12483 LearnDash LMS <= 5.1.5 - Authenticated (Subscriber+) Arbitrary File Upload via Assignment Upload Handler
Authenticated subscribers can upload arbitrary files, potentially leading to remote code execution if server configurations allow execution in upload directories.
- 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-2026-12483?
CVE-2026-12483 is a high-severity vulnerability in StellarWP LearnDash LMS, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The LearnDash LMS plugin for WordPress is vulnerable to Unrestricted File Type Upload in versions up to and including 5.1.5. This is due to insufficient input validation in the 'learndash_fileupload_process' function, which iterates through an entire array and validates only the first file. This makes it possible for authenticated attackers, with subscriber-level access and above who are enrolled in a course with assignment uploads enabled, to upload arbitrary disallowed files, including PHP files, to the server's wp-content/uploads/learndash/assignments/ directory. The uploaded files can only be used for Remote Code Execution if default server configurations have been changed to allow for execution.
Weakness: CWE-434
Which versions are affected by CVE-2026-12483?
How do I fix CVE-2026-12483?
No fix has been published for CVE-2026-12483 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-12483 being exploited?
There is no known exploitation of CVE-2026-12483 in the wild and no public exploit code.
Sources
Also known as GHSA-48gr-hj52-h85w.