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TI-2021-17651 Aliases CVE-2021-40694GHSA-m37g-mwcg-7j7v

Improper output encoding in moodle

Priority LOW 24CWE-116Published · Updated

Key facts

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

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

Summary

Insufficient escaping of the LaTeX preamble made it possible for site administrators to read files available to the HTTP server system account.

Why it matters now

EPSS 0.00901 59th percentileScored 2026-11-07
Fix Fixed moodle/moodle (Packagist): 3.9.10, 3.10.7, 3.11.3

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
—moodle3.11 to 3.11.2, 3.10 to 3.10.6, 3.9 to 3.9.9 and earlier unsupported versions—No fix listedCNA
—moodle/moodle (Packagist)3.9 to before 3.9.103.9.10Patch availableGHSA-m37g-mwcg-7j7v
—moodle/moodle (Packagist)3.10 to before 3.10.73.10.7Patch availableGHSA-m37g-mwcg-7j7v
—moodle/moodle (Packagist)3.11 to before 3.11.33.11.3Patch availableGHSA-m37g-mwcg-7j7v
  • moodle Vendor— Affected 3.11 to 3.11.2, 3.10 to 3.10.6, 3.9 to 3.9.9 and earlier unsupported versions Fixed in — No fix listed CNA
  • moodle/moodle (Packagist) Vendor— Affected 3.9 to before 3.9.10 Fixed in 3.9.10 Patch available GHSA-m37g-mwcg-7j7v
  • moodle/moodle (Packagist) Vendor— Affected 3.10 to before 3.10.7 Fixed in 3.10.7 Patch available GHSA-m37g-mwcg-7j7v
  • moodle/moodle (Packagist) Vendor— Affected 3.11 to before 3.11.3 Fixed in 3.11.3 Patch available GHSA-m37g-mwcg-7j7v

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*before 3.9.10; 3.10.0 to before 3.10.7; 3.11.0 to before 3.11.3VulnerableMoodle
  • cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* Versions before 3.9.10; 3.10.0 to before 3.10.7; 3.11.0 to before 3.11.3 Vulnerable ·Moodle

Remediation

  • Fix · GHSA-m37g-mwcg-7j7v moodle/moodle (Packagist) Fixed in 3.9.10 Advisory →
  • Fix · GHSA-m37g-mwcg-7j7v moodle/moodle (Packagist) Fixed in 3.10.7 Advisory →
  • Fix · GHSA-m37g-mwcg-7j7v moodle/moodle (Packagist) Fixed in 3.11.3 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-40694
  2. 2026-10-03 Alias added: GHSA-m37g-mwcg-7j7v

References

Advisory 2

Other 1

  • 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