Advisory Published

CVE-2021-24455: XSS

First published: Mon Aug 02 2021(Updated: )

The Tutor LMS – eLearning and online course solution WordPress plugin before 1.9.2 did not escape the Summary field of Announcements (when outputting it in an attribute), which can be created by users as low as Tutor Instructor. This lead to a Stored Cross-Site Scripting issue, which is triggered when viewing the Announcements list, and could result in privilege escalation when viewed by an admin.


Affected SoftwareAffected VersionHow to fix
Themeum Tutor Lms<1.9.2

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Frequently Asked Questions

  • What is CVE-2021-24455?

    CVE-2021-24455 is a vulnerability in the Tutor LMS WordPress plugin that allows for stored cross-site scripting (XSS) attacks.

  • How severe is CVE-2021-24455?

    CVE-2021-24455 has a severity rating of 5.4, which is considered medium.

  • Which version of Tutor LMS is affected by CVE-2021-24455?

    Tutor LMS version up to and excluding 1.9.2 is affected by CVE-2021-24455.

  • What is the CWE classification for CVE-2021-24455?

    The CWE classification for CVE-2021-24455 is CWE-79, which refers to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerabilities.

  • How can I fix CVE-2021-24455?

    To fix CVE-2021-24455, it is recommended to update the Tutor LMS plugin to version 1.9.2 or higher.


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