Moodle: ssrf risk in url downloader via ipv4-mapped ipv6 address bypass (moodle)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.25 % · percentile 16 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- fedora
- NVD status
- Analyzed
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).
Weaknesses (CWE)
- CWE-918 — Server-Side Request Forgery
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | fedora |
| CVSS 3.1 | MEDIUM 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | NVD · patrick@puiterwijk.org (Secondary) |
European references
- ENISA EUVD · EUVD-2026-89716
- GCVE · GCVE-0-2026-102577
Affected configurations (NVD CPE)
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*< 4.5.13cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*≥ 5.0.0 < 5.0.9cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*≥ 5.1.0 < 5.1.6cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*≥ 5.2.0 < 5.2.2
Affected products
| Product | Versions |
|---|---|
| moodle | affected 5.2.0 < 5.2.2 ; affected 5.1.0 < 5.1.6 ; affected 5.0.0 < 5.0.9 ; affected 0 < 4.5.13 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |