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LearnDash LMS CVE-2026-12483

| EUVDEUVD-2026-71098 HIGH
Unrestricted Upload of File with Dangerous Type (CWE-434)
2026-09-04 Wordfence GHSA-48gr-hj52-h85w
7.5
CVSS 3.1 · Vendor: Wordfence
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Severity by source

Vendor (Wordfence) PRIMARY
7.5 HIGH
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.5 HIGH

PR:L for required subscriber auth; AC:H for non-default server PHP-execution config needed for RCE; C/I/A:H scoped to full compromise if RCE achieved.

3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (Wordfence).

CVSS VectorVendor: Wordfence

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Sep 04, 2026 - 14:21 vuln.today
CVE Published
Sep 04, 2026 - 13:29 cve.org
HIGH 7.5

DescriptionCVE.org

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.

AnalysisAI

Unrestricted file upload in the LearnDash LMS WordPress plugin (versions ≤5.1.5) allows authenticated subscribers enrolled in courses with assignment uploads enabled to bypass file-type validation by submitting a multi-file array, where only the first file is validated and subsequent files - including PHP webshells - are silently accepted and written to wp-content/uploads/learndash/assignments/. Remote code execution is contingent on non-default server configurations that permit PHP execution within the uploads directory. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
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Delivery
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Exploit
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Install
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C2
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Execute
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Impact
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Vulnerability AssessmentAI

Exploitation Three prerequisites must all be met: (1) the attacker must hold at least a WordPress subscriber-level account (PR:L - unauthenticated exploitation is not possible); (2) that account must be enrolled in a specific course that has the assignment uploads feature enabled by an instructor or admin - courses with uploads disabled are not reachable through this path; (3) for actual remote code execution, the web server must be configured to allow PHP script execution within wp-content/uploads/learndash/assignments/, which is non-default and contrary to standard WordPress hardening. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 3.1 vector (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H, score 7.5) accurately represents the worst-case RCE scenario but bundles two distinct risk tiers: the file upload itself (AC:L once prerequisites are met) and RCE (AC:H requiring server misconfiguration). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Update the LearnDash LMS plugin to a version beyond 5.1.5; the Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/a539ba27-ad9b-4fe6-8df4-71e262c7b158 should be consulted for the confirmed patched release version, as no specific fix version number was included in the available intelligence. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all WordPress deployments to identify LearnDash plugin installations and confirm versions; disable course assignment upload functionality if affected versions (≤5.1.5) are detected. …

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CVE-2026-12483 vulnerability details – vuln.today

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