TI-2021-02847 Aliases CVE-2021-3943 GHSA-8jhp-2gcr-qw96

Improper input validation in moodle

MEDIUM 47CWE-20Published 2021-11-22 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. A remote code execution risk when restoring backup files was identified.

Why it matters now

EPSS 0.02395 84th percentileScored 2026-11-07

Fix Fixed moodle/moodle (Packagist): 3.11.4, 3.10.8, 3.9.11

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	moodle	moodle 3.11.4, moodle 3.10.8 and moodle 3.9.11	—	No fix listed	CNA
—	moodle/moodle (Packagist)	3.11 to before 3.11.4	3.11.4	Patch available	GHSA-8jhp-2gcr-qw96
—	moodle/moodle (Packagist)	3.10 to before 3.10.8	3.10.8	Patch available	GHSA-8jhp-2gcr-qw96
—	moodle/moodle (Packagist)	3.9 to before 3.9.11	3.9.11	Patch available	GHSA-8jhp-2gcr-qw96

moodle Vendor— Affected moodle 3.11.4, moodle 3.10.8 and moodle 3.9.11 Fixed in — No fix listed CNA
moodle/moodle (Packagist) Vendor— Affected 3.11 to before 3.11.4 Fixed in 3.11.4 Patch available GHSA-8jhp-2gcr-qw96
moodle/moodle (Packagist) Vendor— Affected 3.10 to before 3.10.8 Fixed in 3.10.8 Patch available GHSA-8jhp-2gcr-qw96
moodle/moodle (Packagist) Vendor— Affected 3.9 to before 3.9.11 Fixed in 3.9.11 Patch available GHSA-8jhp-2gcr-qw96

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:moodle:moodle::::::::	3.9.0 – 3.9.10; 3.10.0 – 3.10.7; 3.11.0 – 3.11.3	Vulnerable	Moodle

cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* Versions 3.9.0 – 3.9.10; 3.10.0 – 3.10.7; 3.11.0 – 3.11.3 Vulnerable ·Moodle

Remediation

Fix · GHSA-8jhp-2gcr-qw96 moodle/moodle (Packagist) Fixed in 3.11.4 Advisory →
Fix · GHSA-8jhp-2gcr-qw96 moodle/moodle (Packagist) Fixed in 3.10.8 Advisory →
Fix · GHSA-8jhp-2gcr-qw96 moodle/moodle (Packagist) Fixed in 3.9.11 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2021-3943
2026-10-03 Alias added: GHSA-8jhp-2gcr-qw96

References

Patch 1

https://moodle.org/mod/forum/discuss.php?d=429095

Advisory 2

Other 1

https://github.com/moodle/moodle/commit/58e8ad852f9e75c8158e5bee02c273383f7d9865

TI-2024-22468 moodle: unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php CVSS 3.1CRITICAL 9.8
TI-2021-14741 In Moodle, an SQL injection risk was identified in the library fetching a user's recent courses. CVSS 3.1CRITICAL 9.8
TI-2024-29071 Moodle: remote code execution via calculated question types CVSS 3.1HIGH 8.1
TI-2016-06653 Moodle 3.1.2 allows remote attackers to obtain sensitive information via unspecified… CVSS 3.1HIGH 7.5
TI-2022-00259 SQL injection in moodle CVSS 3.1CRITICAL 9.8
TI-2022-16116 Path traversal in Moodle CVSS 3.1HIGH 7.5

See all 636 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences