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).
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Moodle | — | Upgrade to the latest version of Moodle | Oct 2, 2026 | Sep 30, 2026 |
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