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OpenAdvisories

Weakness (CWE)

CWE-804: Guessable CAPTCHA

Base Incomplete

The product uses a CAPTCHA challenge, but the challenge can be guessed or automatically recognized by a non-human actor.

Source: MITRE CWE-804

All Critical High Medium Low Exploited only Public exploit

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  • Critical 9.1
    CVE-2025-40916

    Mojolicious::Plugin::CaptchaPNG version 1.05 for Perl uses a weak random number source for generating the captcha text

    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.

    GRYPHON Mojolicious::Plugin::CaptchaPNG