iTermSessionLauncher.m in iTerm2 before 3.5.0beta12 does not sanitize paths in x-man-page URLs. They may have shell metacharacters for a /usr/bin/man command line.
iTermSessionLauncher.m in iTerm2 before 3.5.0beta12 does not sanitize ssh hostnames in URLs. The hostname's initial character may be non-alphanumeric. The hostname's other characters may be outside the set of alphanumeric characters, dash, and period.
iTerm2 through 3.3.6 has potentially insufficient documentation about the presence of search history in com.googlecode.iterm2.plist, which might allow remote attackers to obtain sensitive information, as demonstrated by searching for the NoSyncSearchHistory string in .plist files within public Git repositories.