LearnDash LMS <= 5.1.5 — Authenticated (Subscriber+) Arbitrary File Upload via Assignment Upload Handler
CVE-2026-12483Published · Updated Action summary
Affected: ≤5.1.5Update to 5.1.5.1 or newer
All remediation steps- Severity
- High7.5
- CVSS
- 7.5CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:HAttack complexity- High
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-434 Arbitrary File Upload
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
LearnDash LMS sfwd-lms
- Affected≤ 5.1.5
- Patched in5.1.5.1
Update to 5.1.5.1 or newer.
You are affected if you run ≤ 5.1.5. Version 5.1.5.1 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under LearnDash LMS.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 5.1.5.1, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch LearnDash LMS to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Nguyen Ngoc Duc (duc193).
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in LearnDash LMS
All 12| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.4 | 5.1.6 - Unauthenticated Arbitrary Course Enrollment via REST Endpoint 4.25.0 – 5.1.6Update to 5.1.6.1 | CVE-2026-12843 | |
| Medium6.5 | Authenticated (Contributor+) SQL Injection via 'filters[orderby_order]' Parameter ≤5.0.3Update to 5.0.3.1 | CVE-2026-3079 | |
| Medium5.3 | Missing Authorization ≤4.20.0.1Update to 4.20.0.3 | CVE-2025-24662 | |
| Medium5.3 | Sensitive Information Exposure via API ≤4.10.2Update to 4.10.3 | CVE-2024-1208 | |
| Medium5.3 | Sensitive Information Exposure via API ≤4.10.1Update to 4.10.2 | CVE-2024-1210 |
- Medium5.45.1.6 - Unauthenticated Arbitrary Course Enrollment via REST Endpoint
4.25.0 – 5.1.6Update to 5.1.6.1
- Medium6.5Authenticated (Contributor+) SQL Injection via 'filters[orderby_order]' Parameter
≤5.0.3Update to 5.0.3.1
- Medium5.3Missing Authorization
≤4.20.0.1Update to 4.20.0.3
- Medium5.3Sensitive Information Exposure via API
≤4.10.2Update to 4.10.3
- Medium5.3Sensitive Information Exposure via API
≤4.10.1Update to 4.10.2
Same weakness (Arbitrary File Upload)
All Arbitrary File Upload| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity high, CVSS 7.5
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.