The Catalyst-Plugin-Static-Simple module before 0.34 for Perl allows remote attackers to read arbitrary files if there is a '.' character anywhere in the pathname, which differs from the intended policy of allowing access only when the filename itself has a '.' character.

• https://blog.hackeriet.no/cpan-signature-verification-vulnerabilities/
• https://metacpan.org/pod/CPAN::Checksums