CVE-2026-102577

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

State: Published
Severity: 4.3 Medium
Published: Sep 30, 2026
Updated: Sep 30, 2026
Reserved: Sep 29, 2026

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).

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	fedora

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
moodle	5.2.0 to before 5.2.2Affected 5.1.0 to before 5.1.6Affected 5.0.0 to before 5.0.9Affected before 4.5.13Affected

References

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