What’s Vulnerable › Vulnerabilities

CVE-2021-24308: LifterLMS < 4.21.1 - Authenticated Stored XSS in Edit Profile

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-24 · updated 2026-06-17
• Weakness: CWE-79

Description

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.

Affected products

• chrisbadgett LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes: before 4.21.1 — fixed in 4.21.1

How to fix

Upgrade to a fixed version: chrisbadgett LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes 4.21.1. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/162856/WordPress-LifterLMS-4.21.0-Cross-Site-Scripting.html
• https://github.com/gocodebox/lifterlms/releases/tag/4.21.1
• https://wpscan.com/vulnerability/f29f68a5-6575-441d-98c9-867145f2b082
• http://packetstormsecurity.com/files/162856/WordPress-LifterLMS-4.21.0-Cross-Site-Scripting.html
• https://github.com/gocodebox/lifterlms/releases/tag/4.21.1
• https://wpscan.com/vulnerability/f29f68a5-6575-441d-98c9-867145f2b082

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