Description
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).
Published: 2026-09-30
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 30 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 30 Sep 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Moodle
Moodle moodle
Vendors & Products Moodle
Moodle moodle

Wed, 30 Sep 2026 09:00:00 +0000

Type Values Removed Values Added
Description 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).
Title Moodle: ssrf risk in url downloader via ipv4-mapped ipv6 address bypass
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: fedora

Published:

Updated: 2026-09-30T14:37:24.853Z

Reserved: 2026-09-29T14:03:38.493Z

Link: CVE-2026-102577

cve-icon Vulnrichment

Updated: 2026-09-30T14:37:21.338Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-30T09:17:14.660

Modified: 2026-09-30T16:20:44.613

Link: CVE-2026-102577

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T12:00:16Z

Weaknesses
  • CWE-918

    Server-Side Request Forgery (SSRF)