SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

Tenshi 0.15 creates a tenshi.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for tenshi.pid modification before a root script executes a "kill `cat /pathname/tenshi.pid`" command.

SOGo before 2.3.12 and 3.x before 3.1.1 does not restrict access to the UID and DTSTAMP attributes, which allows remote authenticated users to obtain sensitive information about appointments with the "View the Date & Time" restriction, as demonstrated by correlating UIDs and DTSTAMPs between all users.

Multiple cross-site scripting (XSS) vulnerabilities in (a) PMOS Help Desk 2.4, formerly (b) InverseFlow Help Desk 2.31 and also sold as (c) Ace Helpdesk 2.31, allow remote attackers to inject arbitrary web script or HTML via the (1) id or email parameter to ticketview.php, or (2) the email parameter to ticket.php.