From the README file:

These modules are used to keep persistent user data across http requests.
Apache::Session was designed for use with Apache and mod_perl, but works
just as well under CGI and any other web server.

Apache::Session is Copyright(c) 1998, 1999 Jeffrey William Baker
<jeffrey@kathyandjeffrey.net>.  Distribute under the same terms as
Perl itself.

WWW: https://metacpan.org/release/Apache-Session