[MEDIUM] CVE-2015-4050: ESI unauthorized access

PKSA-35ts-w5by-rx5d CVE-2015-4050 GHSA-qmqw-mpqp-mr54

Affected package: symfony/http-kernel

Affected version: >=2.3.19,<2.3.29|>=2.4.9,<2.5.0|>=2.5.4,<2.5.12|>=2.6.0,<2.6.8

Reported by:
GitHub, FriendsOfPHP/security-advisories