Search by 
pusher/pusher-php-server Security Advisories for 2.1.2 (1)
-
[MEDIUM] Exploit in the private channel authentication
PKSA-kyn4-mjp3-yprj GHSA-7v7m-pcw5-h3cg
Affected version: <2.2.1
Reported by:
GitHub, FriendsOfPHP/security-advisories