CVE-2025-49091 (CVSS 8.2)

Description

KDE Konsole before 25.04.2 allows remote code execution in a certain scenario. It supports loading URLs from the scheme handlers such as a ssh:// or telnet:// or rlogin:// URL. This can be executed regardless of whether the ssh, telnet, or rlogin binary is available. In this mode, there is a code path where if that binary is not available, Konsole falls back to using /bin/bash for the given arguments (i.e., the URL) provided. This allows an attacker to execute arbitrary code.

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CVSS v3.1 Score

8.2

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L

Weakness Type (CWE)

CWE-670 CWE-670

References

Other References

https://invent.kde.org/utilities/konsole/-/commit/09d20dea109050b4c02fb73095f327b5642a2b75 https://invent.kde.org/utilities/konsole/-/tags https://kde.org/info/security/advisory-20250609-1.txt https://konsole.kde.org/changelog.html https://proofnet.de/publikationen/konsole_rce.html https://www.openwall.com/lists/oss-security/2025/06/10/5 https://lists.debian.org/debian-lts-announce/2025/06/msg00019.html

Frequently Asked Questions

What is CVE-2025-49091? +

KDE Konsole before 25.04.2 allows remote code execution in a certain scenario. It supports loading URLs from the scheme handlers such as a ssh:// or telnet:// or rlogin:// URL. This can be executed regardless of whether the ssh, telnet, or rlogin binary is available. In this mode, there is a code path where if that binary is not available, Konsole falls back to using /bin/bash for the given arguments (i.e., the URL) provided. This allows an attacker to execute arbitrary code. It has a CVSS v3.1 base score of 8.2 (HIGH).

How severe is CVE-2025-49091? +

CVE-2025-49091 has a CVSS v3.1 score of 8.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2025-49091? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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