CVE-2016-2403: Sensiolabs Symfony

Critical severity, CVSS 9.8. EPSS: 2.9% chance of exploitation in the next 30 days.

Symfony before 2.8.6 and 3.x before 3.0.6 allows remote attackers to bypass authentication by logging in with an empty password and valid username, which triggers an unauthenticated bind.

Affected products

• Sensiolabs Symfony: version 2.8.0 only; version 2.8.1 only; version 2.8.2 only; version 2.8.3 only; version 2.8.4 only; version 2.8.5 only; …

Published 2017-02-07. Last modified 2026-06-17.