CVE-2021-24562 json
LifterLMS < 4.21.2 - Access Other Student Grades/Answers via IDOR
published 2021-08-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11474
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 76%
- public exploits
- 0
- none known
Summary
The LMS by LifterLMS – Online Course, Membership & Learning Management System Plugin for WordPress plugin before 4.21.2 was affected by an IDOR issue, allowing students to see other student answers and grades
Patch / fix
- lifterlms lifterlms 4.21.2
Exploit prediction
1.63% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/d45bb744-4a0d-4af0-aa16-71f7e3ea6e00 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- Unknown LMS by LifterLMS – Online Course, Membership & Learning Management System Plugin for WordPress
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
- Technology feeds
References
-
wpscan.com
/vulnerability/d45bb744-4a0d-4af0-aa16-71f7e3ea6e00
exploit, third-party-advisory
-
make.lifterlms.com
/2021/05/17/lifterlms-version-4-21-2/
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-24562
- NVD CVE-2021-24562
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.