source: https://www.securityfocus.com/bid/30332/info

eSyndiCat is prone to an authentication-bypass vulnerability because it fails to adequately verify user-supplied input used for cookie-based authentication.

An attacker can exploit this vulnerability to gain administrative access to the affected application; other attacks are also possible.

eSyndiCat 1.6 is vulnerable; other versions may also be affected. 

javascript:document.cookie = "admin_lng=1; path=/";