Moodle: ssrf risk in url downloader via ipv4-mapped ipv6 address bypass
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).
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-102577US | — | — | ||
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-h… | ||||
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references
External citations — patches, advisories, analysis.
- http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88779FIX
- https://access.redhat.com/security/cve/CVE-2026-102577ADVISORY
- https://bugzilla.redhat.com/show_bug.cgi?id=2543604ADVISORY
- https://moodle.org/mod/forum/discuss.php?d=482495ADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2026-102577WEB
scry
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