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LearnDash WordPress LMS 3.1.2 Cross Site Scripting

LearnDash WordPress LMS 3.1.2 Cross Site Scripting
Posted Feb 10, 2020
Authored by Jinson Varghese Behanan

LearnDash WordPress LMS plugin version 3.1.2 suffers from a cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2020-7108
SHA-256 | b8f171cf29223140e8c42cb11d39be46962e88800c6a7f33342a6a57935df5f2

LearnDash WordPress LMS 3.1.2 Cross Site Scripting

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# Exploit Title: LearnDash WordPress LMS Plugin 3.1.2 - Reflective Cross-Site Scripting
# Date: 2020-01-14
# Vendor Homepage: https://www.learndash.com
# Vendor Changelog: https://learndash.releasenotes.io/release/uCskc-version-312
# Exploit Author: Jinson Varghese Behanan
# Author Advisory: https://www.getastra.com/blog/911/plugin-exploit/reflected-xss-vulnerability-found-in-learndash-lms-plugin/
# Author Homepage: https://www.jinsonvarghese.com
# Version: 3.0.0 - 3.1.1
# CVE : CVE-2020-7108

1. Description

LearnDash is one of the most popular and easiest to use WordPress LMS plugins in the market. It allows users to easily create courses and sell them online and boasts a large customer base. The plugin allows users to search for courses they have subscribed to using the [ld_profile] search field, which was found to be vulnerable to reflected cross site scripting. All WordPress websites using LearnDash version 3.0.0 through 3.1.1 are affected.

2. Proof of Concept

Once the user is logged in to the WordPress website where the vulnerable LearnDash plugin is installed, the XSS payload can be inserted into the Search Your Courses box. The payload gets executed because the user input is not properly validated. As a result, passing the XSS payload as a query string in the URL will also execute the payload.

[wordpress website][learndash my-account page]?ld-profile-search=%3Cscript%3Ealert(document.cookie)%3C/script%3E

An attacker can modify the above URL and use an advanced payload that could help him/her in performing malicious actions.

3. Timeline

Vulnerability reported to the LearnDash team – January 14, 2020
LearnDash version 3.1.2 containing the fix released – January 14, 2020
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