WordPress LifterLMS 4.21.0 Cross Site Scripting

CVE Category Price Severity
CVE-2021-24308 CWE-79 $500 Medium
Author Risk Exploitation Type Date
Unknown High Remote 2021-05-28
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L 0.9711 0.97502

CVSS vector description

Our sensors found this exploit at:

Below is a copy:

WordPress LifterLMS 4.21.0 Cross Site Scripting
# Exploit Title: WordPress Plugin LifterLMS 4.21.0 - Stored Cross-Site Scripting (XSS) 
# Date: 2021-05-10
# Exploit Author: Captain_hook
# Vendor Homepage:
# Software Link:
# Version: LifterLMS < 4.21.1
# Tested on: ANY
# CVE : CVE-2021-24308


The 'State' field of the Edit profile page of the LMS by LifterLMS  Online Course, Membership & Learning Management System Plugin for WordPress plugin before 4.21.1 is not properly sanitised when output in the About section of the profile page, leading to a stored Cross-Site Scripting issue. This could allow low privilege users (such as students) to elevate their privilege via an XSS attack when an admin will view their profile.


1- As a Lowest Privilege user go to the edit account page of the LMS

2- Put Your XSS payload in State parameter and save your edits, such
as "><script>alert(/XSS/)</script>

3- The XSS will be stored and triggered in the about section of the profile: (e.g[user_name]/) (Note): The XSS will also be triggered in the admin dashboard when viewing the user details, for example


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