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  5. CVE-2021-36401

CVE-2021-36401: Moodle vulnerable to Stored Cross-site Scripting

March 7, 2023 (updated March 7, 2025)

In Moodle, ID numbers exported in HTML data formats required additional sanitizing to prevent a local stored XSS risk.

References

  • github.com/advisories/GHSA-g6h6-4fp6-w33w
  • github.com/moodle/moodle
  • moodle.org/mod/forum/discuss.php?d=424807
  • nvd.nist.gov/vuln/detail/CVE-2021-36401

Code Behaviors & Features

Detect and mitigate CVE-2021-36401 with GitLab Dependency Scanning

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Affected versions

All versions before 3.9.8, all versions starting from 3.10.0-beta before 3.10.5, all versions starting from 3.11.0-beta before 3.11.1

Fixed versions

  • 3.11.1
  • 3.10.5
  • 3.9.8

Solution

Upgrade to versions 3.10.5, 3.11.1, 3.9.8 or above.

Impact 4.8 MEDIUM

CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Learn more about CVSS

Weakness

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Source file

packagist/moodle/moodle/CVE-2021-36401.yml

Spotted a mistake? Edit the file on GitLab.

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