CVE-2021-24740: Tutor LMS < 1.9.9 - Multiple Admin+ Stored Cross-Site Scripting

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-10-18 · updated 2026-06-17
Weakness: CWE-79

Description

The Tutor LMS WordPress plugin before 1.9.9 does not escape some of its settings before outputting them in attributes, which could allow high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

Affected products

themeum Tutor LMS – eLearning and online course solution: before 1.9.9 — fixed in 1.9.9

How to fix

Upgrade to a fixed version: themeum Tutor LMS – eLearning and online course solution 1.9.9. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/e6cf694d-c4ae-4b91-97c0-a6bdbafc7d60
https://wpscan.com/vulnerability/e6cf694d-c4ae-4b91-97c0-a6bdbafc7d60

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