Directory traversal vulnerability in Twonky Server 7.0.11 through 8.5 allows remote attackers to share the contents of arbitrary directories via a .. (dot dot) in the contentbase parameter to rpc/set_all.

Cross-site scripting (XSS) vulnerability in Twonky Server 7.0.11 through 8.5 allows remote attackers to inject arbitrary web script or HTML via the friendlyname parameter to rpc/set_all.

Twonky Server before 8.5.1 has XSS via a folder name on the Shared Folders screen.

Twonky Server before 8.5.1 has XSS via a modified "language" parameter in the Language section.

Twonky Server 8.5.2 on Linux and Windows is vulnerable to an access control flaw. An unauthenticated attacker can bypass web service API authentication controls to leak a log file and read the administrator's username and encrypted password.

Twonky Server 8.5.2 on Linux and Windows is vulnerable to a cryptographic flaw, use of hard-coded cryptographic keys. An attacker with knowledge of the encrypted administrator password can decrypt the value with static keys to view the plain text password and gain administrator-level access to Twonky Server.