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Moodle: Stored XSS in quiz override screens via user ID number (CVE-2021-36399)

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Moodle: Stored XSS in quiz override screens via user ID number (CVE-2021-36399)

Severity
5
CVSS
(AV:N/AC:M/Au:S/C:P/I:P/A:N)
Published
03/06/2023
Created
03/17/2023
Added
03/17/2023
Modified
01/28/2025

Description

In Moodle, ID numbers displayed in the quiz override screens required additional sanitizing to prevent a stored XSS risk.

Solution(s)

  • moodle-upgrade-3_11_1

References

  • https://attackerkb.com/topics/cve-2021-36399
  • CVE - 2021-36399
  • https://moodle.org/mod/forum/discuss.php?d=424805
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