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CVE-2026-102586

Moodle: xss via password reset link due to insufficient username escaping

CVSS 3.1 4.3 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-102586

Published

A flaw was found in Moodle. Insufficient sanitization of username input on the password reset page allows a remote attacker to conduct a cross-site scripting (XSS) attack. By convincing an unauthenticated user to access a specially crafted password reset link, an attacker could execute arbitrary script in the victim's browser.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-102586

Published

moodle

https://git.moodle.org

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "versions": [
                        {
                            "status": "affected",
                            "version": "5.2.0",
                            "lessThan": "5.2.2",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "5.1.0",
                            "lessThan": "5.1.6",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "5.0.0",
                            "lessThan": "5.0.9",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "4.5.13",
                            "versionType": "semver"
                        }
                    ],
                    "packageName": "moodle",
                    "collectionURL": "https://git.moodle.org",
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON