CVE-2018-12040: Sensiolabs Symfony

Medium severity, CVSS 6.1. EPSS: 1.3% chance of exploitation in the next 30 days.

Reflected Cross-site scripting (XSS) vulnerability in the web profiler in SensioLabs Symfony 3.3.6 allows remote attackers to inject arbitrary web script or HTML via the "file" parameter, aka an _profiler/open?file= URI. NOTE: The vendor states "The XSS ... is in the web profiler, a tool that should never be deployed in production (so, we don't handle those issues as security issues).

Affected products

• Sensiolabs Symfony: version 3.3.6 only

Published 2018-06-13. Last modified 2026-06-17.