The UNIX and Linux SysAdm Handbook: Why are cached man pages a "security risk"?

The *UNIX and Linux System Administration Handbook* says: > man maintains a cache of formatted pages in /var/cache/man or > /usr/share/man if the appropriate directories are writable; however, > this is a security risk. Most systems preformat the man pages once at > installation time (see catman) or not at all. What is the "security risk(s)" here? There is the obvious security risk that someone can alter the man pages to trick a (novice) user into running something undesirable, as pointed out by [Ulrich Schwartz in their answer](https://unix.stackexchange.com/a/652326/) , but I am looking for other ways this could be exploited. Thanks!