CVE-2025-67855: Mooodle: mooodle: information disclosure and script execution via reflected cross-site scripting

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-03 · updated 2026-06-17
Weakness: CWE-79

Description

A flaw was found in mooodle. A remote attacker could exploit a reflected Cross-Site Scripting (XSS) vulnerability in the policy tool return URL. This vulnerability arises from insufficient sanitization of URL parameters, allowing attackers to inject malicious scripts through specially crafted links. Successful exploitation could lead to information disclosure or arbitrary client-side script execution within the user's browser.

Affected products

Moodle: before 4.1.22; from 4.4.0 before 4.4.11; from 4.5.0 before 4.5.8; from 5.0.0 before 5.0.4; 5.1.0 — fixed in 4.1.22, 4.4.11, 4.5.8, 5.0.4

How to fix

Upgrade to a fixed version: Moodle 4.1.22, 4.4.11, 4.5.8, 5.0.4. Check the vendor advisory for mitigations.

References

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