installer.pl in Open Ticket Request System (OTRS) before 3.0.3 has an Inbound Mail Password field that uses the text type, instead of the password type, for its INPUT element, which makes it easier for physically proximate attackers to obtain the password by reading the workstation screen.

Open Ticket Request System (OTRS) before 3.0.0-beta7 does not properly restrict the ticket ages that are within the scope of a search, which allows remote authenticated users to cause a denial of service (daemon hang) via a fulltext search.

Open Ticket Request System (OTRS) before 2.4.0-beta2 does not properly enforce the move_into permission setting for a queue, which allows remote authenticated users to bypass intended access restrictions and read a ticket by watching this ticket, and then selecting the ticket from the watched-tickets list.

Open Ticket Request System (OTRS) before 2.3.6 does not properly handle e-mail messages in which the From line contains UTF-8 characters associated with diacritical marks and an invalid charset, which allows remote attackers to cause a denial of service (duplicate tickets and duplicate auto-responses) by sending a crafted message to a POP3 mailbox.

The ACL-customer-status Ticket Type setting in Open Ticket Request System (OTRS) before 3.0.0-beta1 does not restrict the ticket options after an AJAX reload, which allows remote authenticated users to bypass intended ACL restrictions on the (1) Status, (2) Service, and (3) Queue via selections.

The S/MIME feature in Open Ticket Request System (OTRS) before 2.3.4 does not configure the RANDFILE and HOME environment variables for OpenSSL, which might make it easier for remote attackers to decrypt e-mail messages that had lower than intended entropy available for cryptographic operations, related to inability to write to the seeding file.

The (1) AgentInterface and (2) CustomerInterface components in Open Ticket Request System (OTRS) before 3.0.6 place cleartext credentials into the session data in the database, which makes it easier for context-dependent attackers to obtain sensitive information by reading the _UserLogin and _UserPW fields.

Multiple cross-site scripting (XSS) vulnerabilities in Open Ticket Request System (OTRS) before 2.3.3 allow remote attackers to inject arbitrary web script or HTML via vectors related to (1) AgentTicketMailbox or (2) CustomerTicketOverView.

Race condition in the Kernel::System::Main::FileWrite method in Open Ticket Request System (OTRS) before 2.4.8 allows remote authenticated users to corrupt the TicketCounter.log data in opportunistic circumstances by creating tickets.

webscript.pl in Open Ticket Request System (OTRS) 2.3.4 and earlier allows remote attackers to execute arbitrary commands via unspecified vectors, related to a "command injection vulnerability."