Moodle

CVE-2021-36400

MEDIUM 5.3

At a glance

Source: NVD
EPSS: EPSS 0.51 % · percentile 43 (2026-10-29)
State: PUBLISHED
Published: 2023-03-06 00:00 UTC
Updated: 2025-03-07 18:03 UTC
Assigner: fedora
NVD status: Modified

Search on…

Description

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

Weaknesses (CWE)

CWE-276 — Incorrect Default Permissions
CWE-639 — Authorization Bypass Through User-Controlled Key

References

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

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	CISA-ADP
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	NVD · nvd@nist.gov (Primary)
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Advisories

GHSA-35wf-3wq2-r3hx — Moodle has Incorrect Default Permissions

European references

ENISA EUVD · EUVD-2023-0844
GCVE · GCVE-0-2021-36400

CERT-FR advisories

CERTFR-2021-AVI-544 — Multiples vulnérabilités dans Moodle · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* < 3.9.8
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* ≥ 3.10.0 < 3.10.5
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* ≥ 3.11.0 < 3.11.1

Affected products

Product	Versions
Moodle	affected 3.11, 3.10 to 3.10.4, 3.9 to 3.9.7 and earlier unsupported versions

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD