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 (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.

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."

Open Ticket Request System (OTRS) 2.3.x before 2.3.6 and 2.4.x before 2.4.8 does not properly handle the matching of Perl regular expressions against HTML e-mail messages, which allows remote attackers to cause a denial of service (CPU consumption) via a large message, a different vulnerability than CVE-2010-2080.

Multiple cross-site scripting (XSS) vulnerabilities in Open Ticket Request System (OTRS) 2.3.x before 2.3.6 and 2.4.x before 2.4.8 allow remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.

Multiple SQL injection vulnerabilities in Kernel/System/Ticket.pm in OTRS-Core in Open Ticket Request System (OTRS) 2.1.x before 2.1.9, 2.2.x before 2.2.9, 2.3.x before 2.3.5, and 2.4.x before 2.4.7 allow remote authenticated users to execute arbitrary SQL commands via unspecified vectors.