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CVE-2025-25186

6.5 · MEDIUM

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby.

Published Feb 10, 2025CWE-400EPSS 0.63%

Overview

CVE-2025-25186 is a medium-severity vulnerability. It was published on February 10, 2025 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Starting in version 0.3.2 and prior to versions 0.3.8, 0.4.19, and 0.5.6, there is a possibility for denial of service by memory exhaustion in `net-imap`'s response parser. At any time while the client is connected, a malicious server can send can send highly compressed `uid-set` data which is automatically read by the client's receiver thread. The response parser uses `Range#to_a` to convert the `uid-set` data into arrays of integers, with no limitation on the expanded size of the ranges. Versions 0.3.8, 0.4.19, 0.5.6, and higher fix this issue. Additional details for proper configuration of fixed versions and backward compatibility are available in the GitHub Security Advisory.

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/ruby/net-imap/commit/70e3ddd071a94e450b3238570af482c296380b35GitHubgithub.com/ruby/net-imap/commit/c8c5a643739d2669f0c9a6bb9770d0c045fd74a3GitHubgithub.com/ruby/net-imap/commit/cb92191b1ddce2d978d01b56a0883b6ecf0b1022GitHubgithub.com/ruby/net-imap/security/advisories/GHSA-7fc5-f82f-cx69

How CyberStrike helps

Frequently asked questions

What is CVE-2025-25186?

CVE-2025-25186 is a medium-severity vulnerability. It was published on February 10, 2025 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-25186?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-25186?

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-2025-25186?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-25186 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.

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