Vulnerability DatabaseCVE-2025-40916
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CVE-2025-40916
June 16, 2025
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.
Affected Packages
https://github.com/gryphonshafer/Mojo-Plugin-CaptchaPNG.git (GITHUB):
Affected version(s) >=v1.01 <v1.06
Fix Suggestion:
Update to version v1.06
Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (4)
https://security.metacpan.org/docs/guides/random-data-for-security.html
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/pod/perlfunc#rand
https://metacpan.org/release/GRYPHON/Mojolicious-Plugin-CaptchaPNG-1.06/changes
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Guessable CAPTCHA
CWE-804
Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
CWE-338
EPSS
Base Score:
0.05