BaseFortify

Publication date: 2025-10-06

Last updated on: 2025-11-11

Assigner: MITRE

Description

ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-10-06

Last Modified

2025-11-11

Generated

2026-07-06

AI Q&A

2025-10-06

EPSS Evaluated

2026-07-05

NVD

CVE-2025-61984

Affected Vendors & Products

Vendor	Product	Version / Range
openssh	openssh	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-159	The product does not properly filter, remove, quote, or otherwise manage the invalid use of special elements in user-controlled input, which could cause adverse effect on its behavior and integrity.

Attack-Flow Graph

Executive Summary

This vulnerability exists in OpenSSH versions before 10.1, where control characters in usernames from certain possibly untrusted sources (such as the command line and %-sequence expansion in configuration files) can lead to code execution when a ProxyCommand is used. Usernames provided literally in configuration files are not considered untrusted sources.

Impact Analysis

The vulnerability can potentially allow an attacker to execute arbitrary code via specially crafted usernames containing control characters when a ProxyCommand is used in OpenSSH. This could lead to unauthorized actions or compromise of the system where OpenSSH is running.

Hi! I’m here to help you understand CVE-2025-61984. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70