An issue was discovered in Thunar before 4.16.7 and 4.17.x before 4.17.2. When called with a regular file as a command-line argument, it delegates to a different program (based on the file type) without user confirmation. This could be used to achieve code execution.
Created Thunar tracking bugs for this issue: Affects: epel-all [bug 2264936] Affects: fedora-all [bug 2264937]