Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2025-12875

5.3 · MEDIUM

A weakness has been identified in mruby 3.4.0.

Published Nov 7, 2025CWE-119EPSS 0.17%

Overview

CVE-2025-12875 is a medium-severity vulnerability. It was published on November 7, 2025 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A weakness has been identified in mruby 3.4.0. This vulnerability affects the function ary_fill_exec of the file mrbgems/mruby-array-ext/src/array.c. Executing a manipulation of the argument start/length can lead to out-of-bounds write. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. This patch is called 93619f06dd378db6766666b30c08978311c7ec94. It is best practice to apply a patch to resolve this issue.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/makesoftwaresafe/mruby/commit/93619f06dd378db6766666b30c08978311c7ec94GitHubgithub.com/mruby/mruby/GitHubgithub.com/mruby/mruby/issues/6650GitHubgithub.com/mruby/mruby/issues/6650#event-20443453808GitHubgithub.com/mruby/mruby/issues/6650#issuecomment-3430851605Refvuldb.com/?ctiid.331511Refvuldb.com/?id.331511Refvuldb.com/?submit.680879GitHubgithub.com/mruby/mruby/issues/6650GitHubgithub.com/mruby/mruby/issues/6650#issuecomment-3430851605

How CyberStrike helps

Frequently asked questions

What is CVE-2025-12875?

CVE-2025-12875 is a medium-severity vulnerability. It was published on November 7, 2025 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-12875?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-12875?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-12875?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-12875 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2025

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999