CVE-2025-49091
CVE-2025-49091 is a high-severity vulnerability with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-670.
Key facts
- Severity: High (CVSS 3.x base score 8.2)
- EPSS exploit prediction: 1% (42nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-18073
- Weakness: CWE-670
- Published:
- Last modified:
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.
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.
- How severe is CVE-2025-49091?
- CVE-2025-49091 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.
- Is CVE-2025-49091 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-49091?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-49091 have an EU (EUVD) identifier?
- Yes. CVE-2025-49091 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18073.
- When was CVE-2025-49091 published?
- CVE-2025-49091 was published on 2025-06-11 and last updated on 2026-06-17.
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
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