CVE-2026-12483: stellarwp learndash lms
Vulnerability summary
CVE-2026-12483 is a high (CVSS 7.5) vulnerability in stellarwp learndash lms. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.7% of scored vulnerabilities. Fixed in 5.1.5.1.
Timeline
- 04-09-2026PublishedVulnerability first disclosed.
- 04-09-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 version- NVDNIST7.5HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- wordfenceSource7.5HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.38%
Chance of exploitation in the next 30 days
Percentile
31%
Versus all other CVEs
30-day change
0.00 pp
From 0.38% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Stellarwp1 product
- learndash lms≤ 5.1.5
Wordpress1 product
- sfwd-lms≤ 5.1.5 (fixed in 5.1.5.1)
2 vendors · 2 products