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TI-2021-14747 Aliases CVE-2021-36399GHSA-79jp-m64f-pgrc

Cross-site scripting in Moodle

Priority LOW 25CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

In Moodle, ID numbers displayed in the quiz override screens required additional sanitizing to prevent a stored XSS risk.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00516 44th percentileScored 2026-11-07
Fix Fixed moodle/moodle (Packagist): 3.11.1, 3.10.5, 3.9.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Moodle3.11—No fix listedCNA
—moodle/moodle (Packagist)3.11.0-beta to before 3.11.13.11.1Patch availableGHSA-79jp-m64f-pgrc
—moodle/moodle (Packagist)3.10.0-beta to before 3.10.53.10.5Patch availableGHSA-79jp-m64f-pgrc
—moodle/moodle (Packagist)before 3.9.83.9.8Patch availableGHSA-79jp-m64f-pgrc
  • Moodle Vendor— Affected 3.11 Fixed in — No fix listed CNA
  • moodle/moodle (Packagist) Vendor— Affected 3.11.0-beta to before 3.11.1 Fixed in 3.11.1 Patch available GHSA-79jp-m64f-pgrc
  • moodle/moodle (Packagist) Vendor— Affected 3.10.0-beta to before 3.10.5 Fixed in 3.10.5 Patch available GHSA-79jp-m64f-pgrc
  • moodle/moodle (Packagist) Vendor— Affected before 3.9.8 Fixed in 3.9.8 Patch available GHSA-79jp-m64f-pgrc

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:moodle:moodle:3.11.0:-:*:*:*:*:*:*3.11.0VulnerableMoodle
  • cpe:2.3:a:moodle:moodle:3.11.0:-:*:*:*:*:*:* Versions 3.11.0 Vulnerable ·Moodle

Remediation

  • Fix · GHSA-79jp-m64f-pgrc moodle/moodle (Packagist) Fixed in 3.11.1 Advisory →
  • Fix · GHSA-79jp-m64f-pgrc moodle/moodle (Packagist) Fixed in 3.10.5 Advisory →
  • Fix · GHSA-79jp-m64f-pgrc moodle/moodle (Packagist) Fixed in 3.9.8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-36399
  2. 2026-10-03 Alias added: GHSA-79jp-m64f-pgrc

References

Patch 1

Advisory 1

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