install/index.php in EspoCRM before 2.6.0 allows remote attackers to re-install the application via a 1 value in the installProcess parameter.
https://www.htbridge.com/advisory/HTB23238
https://euvd.enisa.europa.eu/vulnerability/EUVD-2014-7835
http://www.securityfocus.com/bid/70811
http://www.securityfocus.com/archive/1/533844/100/0/threaded
http://packetstormsecurity.com/files/128888/EspoCRM-2.5.2-XSS-LFI-Access-Control.html