CVE-2025-40916

Published: Jun 16, 2025Modified: Jun 17, 2026Deferred

9.1

Vector

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

Exploitability: 3.9 / Impact: 5.2

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Related CWEs

CWE-338

Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.

CWE-804

Guessable CAPTCHA

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

References (4)

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

Timeline

No history available yet.