CVE-2025-40916

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

Description

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.

Remediation

Solution:

  • Users should upgrade to version 1.06 or later.

Category

9.1
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.02%
Affected: GRYPHON Mojolicious::Plugin::CaptchaPNG
Published at:
Updated at:

References

Link Tags
https://metacpan.org/release/GRYPHON/Mojolicious-Plugin-CaptchaPNG-1.04/diff/GRYPHON/Mojolicious-Plugin-CaptchaPNG-1.05/lib/Mojolicious/Plugin/CaptchaPNG.pm
https://metacpan.org/release/GRYPHON/Mojolicious-Plugin-CaptchaPNG-1.06/changes
https://metacpan.org/pod/perlfunc#rand
https://security.metacpan.org/docs/guides/random-data-for-security.html

Frequently Asked Questions

What is the severity of CVE-2025-40916?
CVE-2025-40916 has been scored as a critical severity vulnerability.
How to fix CVE-2025-40916?
To fix CVE-2025-40916: Users should upgrade to version 1.06 or later.
Is CVE-2025-40916 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-40916 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-40916?
CVE-2025-40916 affects GRYPHON Mojolicious::Plugin::CaptchaPNG.
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