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CVE-2021-36400

MEDIUM severity · CVSS 5.3 · CWE-276
5.3CVSS MEDIUM

Summary

In Moodle, insufficient capability checks made it possible to remove other users' calendar URL subscriptions.

Impact & exploitability

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactLow
Availability impactNone
Exploit probability (EPSS)0%

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

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://moodle.org/mod/forum/discuss.php?d=424806 ↗

Last checked: Wed, 10 Jun 2026 22:18:30 UTC