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TI-2023-12880 Aliases CVE-2023-28332GHSA-9f45-9qrw-pp4v

Moodle: algebra filter xss when filter is misconfigured

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

If the algebra filter was enabled but not functional (eg the necessary binaries were missing from the server), it presented an XSS risk.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00634 50th percentileScored 2026-11-07
Fix Fixed moodle: 4.1.2, 4.0.7, 3.11.13 +1moodle/moodle (Packagist): 4.1.2, 4.0.7, 3.11.13 +1

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
—moodle4.1.0 to before 4.1.2; 4.0.0 to before 4.0.7; 3.11.0 to before 3.11.13; before 3.9.204.1.2, 4.0.7, 3.11.13, 3.9.20Patch availableCNA
—moodle/moodle (Packagist)4.1.0 to before 4.1.24.1.2Patch availableGHSA-9f45-9qrw-pp4v
—moodle/moodle (Packagist)4.0.0 to before 4.0.74.0.7Patch availableGHSA-9f45-9qrw-pp4v
—moodle/moodle (Packagist)3.11.0 to before 3.11.133.11.13Patch availableGHSA-9f45-9qrw-pp4v
—moodle/moodle (Packagist)before 3.9.203.9.20Patch availableGHSA-9f45-9qrw-pp4v
  • moodle Vendor— Affected 4.1.0 to before 4.1.2; 4.0.0 to before 4.0.7; 3.11.0 to before 3.11.13; before 3.9.20 Fixed in 4.1.2, 4.0.7, 3.11.13, 3.9.20 Patch available CNA
  • moodle/moodle (Packagist) Vendor— Affected 4.1.0 to before 4.1.2 Fixed in 4.1.2 Patch available GHSA-9f45-9qrw-pp4v
  • moodle/moodle (Packagist) Vendor— Affected 4.0.0 to before 4.0.7 Fixed in 4.0.7 Patch available GHSA-9f45-9qrw-pp4v
  • moodle/moodle (Packagist) Vendor— Affected 3.11.0 to before 3.11.13 Fixed in 3.11.13 Patch available GHSA-9f45-9qrw-pp4v
  • moodle/moodle (Packagist) Vendor— Affected before 3.9.20 Fixed in 3.9.20 Patch available GHSA-9f45-9qrw-pp4v

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*after 3.9.0, before 3.9.20; after 3.11.0, before 3.11.13; after 4.0.0, before 4.0.7VulnerableMoodle
cpe:2.3:a:moodle:moodle:3.9.0:-:*:*:*:*:*:*3.9.0VulnerableMoodle
cpe:2.3:a:moodle:moodle:3.11.0:-:*:*:*:*:*:*3.11.0VulnerableMoodle
cpe:2.3:a:moodle:moodle:4.0.0:-:*:*:*:*:*:*4.0.0VulnerableMoodle
cpe:2.3:a:moodle:moodle:4.1.0:-:*:*:*:*:*:*4.1.0VulnerableMoodle
cpe:2.3:a:moodle:moodle:4.1.1:*:*:*:*:*:*:*4.1.1VulnerableMoodle
  • cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* Versions after 3.9.0, before 3.9.20; after 3.11.0, before 3.11.13; after 4.0.0, before 4.0.7 Vulnerable ·Moodle
  • cpe:2.3:a:moodle:moodle:3.9.0:-:*:*:*:*:*:* Versions 3.9.0 Vulnerable ·Moodle
  • cpe:2.3:a:moodle:moodle:3.11.0:-:*:*:*:*:*:* Versions 3.11.0 Vulnerable ·Moodle
  • cpe:2.3:a:moodle:moodle:4.0.0:-:*:*:*:*:*:* Versions 4.0.0 Vulnerable ·Moodle
  • cpe:2.3:a:moodle:moodle:4.1.0:-:*:*:*:*:*:* Versions 4.1.0 Vulnerable ·Moodle
  • cpe:2.3:a:moodle:moodle:4.1.1:*:*:*:*:*:*:* Versions 4.1.1 Vulnerable ·Moodle

Remediation

  • Fix · CNA moodle Fixed in 4.1.2, 4.0.7, 3.11.13, 3.9.20
  • Fix · GHSA-9f45-9qrw-pp4v moodle/moodle (Packagist) Fixed in 4.1.2 Advisory →
  • Fix · GHSA-9f45-9qrw-pp4v moodle/moodle (Packagist) Fixed in 4.0.7 Advisory →
  • Fix · GHSA-9f45-9qrw-pp4v moodle/moodle (Packagist) Fixed in 3.11.13 Advisory →
  • Fix · GHSA-9f45-9qrw-pp4v moodle/moodle (Packagist) Fixed in 3.9.20 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-2023-28332
  2. 2026-10-03 Alias added: GHSA-9f45-9qrw-pp4v
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Patch 1

Advisory 2

Other 6

  • 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