Input validation error in konsole - CVE-2025-49091
Published: June 9, 2025
Vulnerability identifier: #VU110673
CSH Severity: Critical
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Red
CVE-ID: CVE-2025-49091
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: KDE.org
Affected software:
konsole
konsole
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of telnet://URL scheme. A remote attacker can trick the victim into clicking on a specially crafted URL and execute arbitrary console commands on the system with privileges of the current user.
The vulnerability affects installations without telnet client installed.
How to mitigate CVE-2025-49091
Install updates from vendor's website.
As a temporary solution you can install the telnet client, or delete the file:
/usr/share/applications/ktelnetservice6.desktop