Moodle Improper Authentication

MEDIUM 4.3CVE-2021-40691 · BIT-moodle-2021-40691 · GHSA-92vh-mr2w-j2cr · Published 29/09/2022 · updated 17/06/2026

In short

CVE-2021-40691 is a MEDIUM (CVSS 4.3) vulnerability affecting moodle/moodle, moodle (moodle).
Chance of exploitation in the next 30 days (EPSS): 0.71%, higher than 53.6% of all vulnerabilities.
Fix: update to 3.10.7, 3.11.3, 3.9.10 or later.

Package	Affected versions	Patched versions
moodle/moodle Packagist	`≥ 3.10, < 3.10.7≥ 3.11, < 3.11.3≥ 3.9, < 3.9.10`	`3.10.73.11.33.9.10`
moodle moodle	`≥ 3.10.0, < 3.10.7≥ 3.11.0, < 3.11.3< 3.9.10`	`3.10.73.11.33.9.10`

A session hijack risk was identified in the Shibboleth authentication plugin.

NVD description

A session hijack risk was identified in the Shibboleth authentication plugin.

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Package

Affected versions

Patched versions

Packagist

≥ 3.10, < 3.10.7≥ 3.11, < 3.11.3≥ 3.9, < 3.9.10

3.10.73.11.33.9.10

≥ 3.10.0, < 3.10.7≥ 3.11.0, < 3.11.3< 3.9.10

3.10.73.11.33.9.10

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