Vim is an open source, command line text editor. Prior to 9.2.0735, the C omni-completion script in runtime/autoload/ccomplete.vim interpolates the typeref: or typename: extension field of a tags entry, without escaping, into a :vimgrep pattern that is run through :execute. Because :vimgrep honors the bar as a command separator, a crafted tag field can close the search pattern and append an arbitrary Ex command; opening a hostile .c file whose project tags file contains such an entry and invoking C omni-completion runs that command as the editing user. This issue is fixed in version 9.2.0735.
2:8.2.3995-1ubuntu2.342:9.1.0016-1ubuntu7.182:9.1.2141-1ubuntu4.72:7.4.052-1ubuntu3.1+esm312:7.4.1689-3ubuntu1.5+esm372:8.0.1453-1ubuntu1.13+esm222:8.1.2269-1ubuntu5.32+esm10Exploitability
AV:LAC:LAT:NPR:NUI:AVulnerable System
VC:HVI:HVA:HSubsequent System
SC:NSI:NSA:NCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N