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

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