CVE-2015-3178: Moodle

Low severity, CVSS 3.5. EPSS: 1.4% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in the external_format_text function in lib/externallib.php in Moodle through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6 allows remote authenticated users to inject arbitrary web script or HTML into an external application via a crafted string that is visible to web services.

Affected products

• Moodle Moodle: up to and including 2.5.9; version 2.5.0 only; version 2.5.1 only; version 2.5.2 only; version 2.5.3 only; version 2.5.4 only; …

Published 2015-06-01. Last modified 2026-06-17.