CVE-2026-12483High· 7.5▾ Twilight

The LearnDash LMS plugin for WordPress is vulnerable to Unrestricted File Type Upload in versions up to and including 5.1.5

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score41/ 100 · Moderate

impact 41.3 · likelihood 0.1 · exploitation 0

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Proof of concept

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Published

Sep 4, 2026

Updated

Sep 8, 2026

CVSS

7.5

Vendor

—

Product

—

CWE

CWE-434

Depth score

41 · Moderate

EPSS

0.65% · p51

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS history

Exploit-prediction probability, daily snapshots since Sep 8.

0.4% → 0.6%▲ 0.3%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 52 days

Sep 4, 2026Published
Disclosed via NVD
Sep 8, 2026Record revised
Last analysed / modified upstream
Sep 8, 2026EPSS first tracked
0.4%
Oct 26, 2026EPSS peak
0.4% → 0.6%

CWE-434 #nvd

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd

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