An Eval Injection issue was discovered in Znuny through 7.1.3. A user with write access to the configuration file can use this to execute a command executed by the user running the backup.pl script.
An issue was discovered in Znuny before 7.1.4. Permissions are not checked properly when using the Generic Interface to update ticket metadata.
An issue was discovered in Znuny and Znuny LTS 6.0.31 through 6.5.7 and Znuny 7.0.1 through 7.0.16 where a logged-in user can upload a file (via a manipulated AJAX Request) to an arbitrary writable location by traversing paths. Arbitrary code can be executed if this location is publicly available through the web server.