Improper Handling of Invalid Use of Special Elements Affecting openssh-portable package, versions [,10.1-p1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published10 Oct 2025
- disclosed6 Oct 2025
- creditDavid Leadbeater
Introduced: 6 Oct 2025
NewCVE-2025-61984 (opens in a new tab)How to fix?
Upgrade openssh-portable to version 10.1-p1 or higher.
Overview
Affected versions of this package are vulnerable to Improper Handling of Invalid Use of Special Elements via the handling of usernames. An attacker can inject shell expressions into command-line constructor by supplying usernames containing control characters. This is only exploitable if usernames are sourced from untrusted input and ProxyCommand is configured to use the %u expansion.