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Mojolicious::Plugin::CaptchaPNG version 1.05 for Perl uses a weak random number source for generating the captcha. That version uses the built-in rand() function for generating the captcha text as well as image noise, which is insecure.
Reserved 2025-04-16 | Published 2025-06-16 | Updated 2025-06-16 | Assigner CPANSecCWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator
metacpan.org/...NG-1.05/lib/Mojolicious/Plugin/CaptchaPNG.pm
metacpan.org/...N/Mojolicious-Plugin-CaptchaPNG-1.06/changes
security.metacpan.org/...uides/random-data-for-security.html
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