Integer overflow in the tr_bitfieldEnsureNthBitAlloced function in bitfield.c in Transmission before 2.84 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted peer message, which triggers an out-of-bounds write.

Stack-based buffer overflow in utp.cpp in libutp, as used in Transmission before 2.74 and possibly other products, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted "micro transport protocol packets."

Multiple cross-site scripting (XSS) vulnerabilities in the web client in Transmission before 2.61 allow remote attackers to inject arbitrary web script or HTML via the (1) comment, (2) created by, or (3) name field in a torrent file.

Cross-site request forgery (CSRF) vulnerability in Transmission 1.5 before 1.53 and 1.6 before 1.61 allows remote attackers to hijack the authentication of unspecified victims via unknown vectors.