CVE-2015-2309

Date: August 19, 2025

Symfony before 2.3.27, 2.5.11 and 2.6.6 is vulnerable to man-in-the-middle attack.The Symfony\Component\HttpFoundation\Request class provides a mechanism that ensures it does not trust HTTP header values coming from a "non-trusted" client. Unfortunately, it assumes that the remote address is always a trusted client if at least one trusted proxy is involved in the request. this allows a man-in-the-middle attack between the latest trusted proxy and the web server.

Language: PHP