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TI-2026-65431 Aliases CVE-2026-102577GHSA-29qm-g73m-2r7h

Moodle: ssrf risk in url downloader via ipv4-mapped ipv6 address bypass

Priority LOW 20CWE-918Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

A flaw was found in Moodle. Incorrect handling of IPv4-mapped IPv6 addresses within the URL downloader's host-blocking logic allows an authenticated remote user to bypass blocked-host restrictions. By supplying a crafted URL, an attacker can induce the server to make requests to restricted destinations, leading to Server-Side Request Forgery (SSRF).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00246 16th percentileScored 2026-11-07
Fix Fixed moodle: 5.2.2, 5.1.6, 5.0.9 +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
—moodle5.2.0 to before 5.2.2; 5.1.0 to before 5.1.6; 5.0.0 to before 5.0.9; before 4.5.135.2.2, 5.1.6, 5.0.9, 4.5.13Patch availableCNA
  • moodle Vendor— Affected 5.2.0 to before 5.2.2; 5.1.0 to before 5.1.6; 5.0.0 to before 5.0.9; before 4.5.13 Fixed in 5.2.2, 5.1.6, 5.0.9, 4.5.13 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*before 4.5.13; 5.0.0 to before 5.0.9; 5.1.0 to before 5.1.6; 5.2.0 to before 5.2.2VulnerableMoodle
  • cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* Versions before 4.5.13; 5.0.0 to before 5.0.9; 5.1.0 to before 5.1.6; 5.2.0 to before 5.2.2 Vulnerable ·Moodle

Remediation

  • Fix · CNA moodle Fixed in 5.2.2, 5.1.6, 5.0.9, 4.5.13

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-2026-102577
  2. 2026-10-03 Alias added: GHSA-29qm-g73m-2r7h

References

Patch 1

Advisory 3

  • 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