CVE-2026-12483
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.5
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS probability
- 0.38%
- CWE
- CWE-434
- Published
- 2026-09-04
- Last modified
- 2026-09-04
Affected products
- StellarWP LearnDash LMS
Weakness type
Related vulnerabilities
- CVE-2026-8778 — MIPL Grouped Checkout Fields for WooCommerce <= 1.2.2 - Unauthenticated Arbitrary File Upload
- CVE-2026-12215 — OTP Login & Register Woocommerce <= 2.7.2 - Unauthenticated Authentication Bypass via Brute Force
- CVE-2026-84063 — BurgerEditor 3.2.0 through 3.4.0 contains an issue with unrestricted upload of file with dangerous...
- CVE-2026-18351 — Drag and Drop File Upload for Elementor Forms <= 1.6.0 - Unauthenticated Arbitrary File Upload via 'type' Parameter
- CVE-2026-87928 — MaxSite CMS 0.94 through 109.6 HTML Upload XSS via admin_page
- CVE-2026-26212 — Rara One Click Demo Import < 1.3.5 Arbitrary File Upload RCE
- CVE-2026-54611 — InstantCMS has Remote Code Execution in package installer
- CVE-2026-86666 — aircheng-org iWebShop-5 pic.php uploadFile unrestricted upload