CVE-2025-40916

9.1 CRITICAL

Published: June 16, 2025 Modified: April 15, 2026

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://metacpan.org/pod/perlfunc#rand

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://metacpan.org/release/GRYPHON/Mojolicious-Plugin-CaptchaPNG-1.04/diff/GRYPHON/Mojolicious-Plugin-CaptchaPNG-1.05/lib/Mojolicious/Plugin/CaptchaPNG.pm

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://metacpan.org/release/GRYPHON/Mojolicious-Plugin-CaptchaPNG-1.06/changes

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://security.metacpan.org/docs/guides/random-data-for-security.html

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

4 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.1 / 10.0

EPSS (Exploit Probability)

0.3%

52th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-338 CWE-804

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