CVE-2026-102586: Moodle

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Moodle Moodle: before 4.5.13 (fixed in 4.5.13); from 5.0.0, before 5.0.9 (fixed in 5.0.9); from 5.1.0, before 5.1.6 (fixed in 5.1.6); from 5.2.0, before 5.2.2 (fixed in 5.2.2)

Published 2026-09-30. Last modified 2026-10-01.