CVE-2021-24308: lifterlms Cross-site Scripting
Vulnerability summary
CVE-2021-24308 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in lifterlms. EPSS estimates a 3.25% chance of exploitation in the next 30 days, higher than 88.1% of scored vulnerabilities. 3 public exploits are recorded. Fixed in 4.21.1.
Timeline
- 24-05-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 2 sources · 2 versions- wordfenceSource5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
3.25%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
0.00 pp
From 3.25% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
3 foundExploit Reference (wpscan.com)
Maturity: unknown
Exploit Reference (packetstormsecurity.com)
Maturity: unknown
WordPress Plugin LifterLMS 4.21.0 - Stored Cross-Site Scripting (XSS)
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Lifterlms2 products
- lifterlms< 4.21.1
- lms by lifterlms – online course, membership & learning management system plugin for wordpress≥ 4.21.1, < 4.21.1
Wordpress1 product
- lifterlms< 4.21.1
2 vendors · 3 products
References
4 links- wpscan.com/vulnerability/f29f68a5-6575-441d-98c9-867145f2b082X Refsource CONFIRMExploitThird Party Advisory
- packetstormsecurity.com/files/162856/WordPress-LifterLMS-4.21.0-Cross-Site-Scripting.htmlX Refsource MISCExploitThird Party AdvisoryVDB Entry