Due to the Firefox GTK wrapper code's use of text/plain for drag data and GTK treating all text/plain MIMEs containing file URLs as being dragged a website could arbitrarily read a file via a call to DataTransfer.setData. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.
109.0+build2-0ubuntu0.18.04.138.8.0~repack1-0ubuntu138.8.0~repack1-0ubuntu338.8.0~repack1-0ubuntu452.3.1-0ubuntu352.3.1-7fakesync152.8.1-0ubuntu0.18.04.152.9.1-0ubuntu0.18.04.11:102.7.1+build2-0ubuntu0.18.04.1109.0+build2-0ubuntu0.20.04.152.9.1-1build152.9.1-1ubuntu368.5.0-1~fakesync68.5.0-2~fakesync68.6.0-168.6.0-1ubuntu11:102.7.1+build2-0ubuntu0.20.04.178.13.0-178.15.0-278.15.0-4ubuntu191.10.0-0ubuntu191.5.1-0ubuntu191.6.0-191.6.0-291.7.0-2Exploitability
AV:NAC:LPR:NUI:RScope
S:UImpact
C:HI:NA:NCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N