GRYPHON Mojolicious::Plugin::CaptchaPNG 1.05 on Perl rand weak prng

CVSS Meta Temp Score
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CTI Interest Score
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3.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in GRYPHON Mojolicious::Plugin::CaptchaPNG 1.05 on Perl. The impacted element is the function rand. This manipulation causes weak prng. The identification of this vulnerability is CVE-2025-40916. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in GRYPHON Mojolicious::Plugin::CaptchaPNG 1.05 on Perl. It has been declared as problematic. Affected by this vulnerability is the function rand. The manipulation with an unknown input leads to a weak prng vulnerability. The CWE definition for the vulnerability is CWE-338. The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The advisory is shared at metacpan.org. This vulnerability is known as CVE-2025-40916 since 04/16/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-18387). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Weak prng
CWE: CWE-338 / CWE-331 / CWE-330
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/16/2025 🔍
06/16/2025 +61 days 🔍
06/16/2025 +0 days 🔍
06/16/2025 +0 days 🔍

Sourcesinfo

Advisory: metacpan.org
Status: Not defined

CVE: CVE-2025-40916 (🔍)
GCVE (CVE): GCVE-0-2025-40916
GCVE (VulDB): GCVE-100-312649
EUVD: 🔍

Entryinfo

Created: 06/16/2025 13:31
Updated: 06/16/2025 16:28
Changes: 06/16/2025 13:31 (54), 06/16/2025 16:28 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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