Insufficient verification of data authenticity in KDE Connect iOS and KDE Connect - CVE-2025-66270
Published: November 27, 2025 / Updated: November 28, 2025
Vulnerability identifier: #VU118798
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-66270
CWE-ID: CWE-345
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a MitM attack.
The vulnerability exists due to the application allows device identifiers to be changed during handshake in core/backends/lan/lanlinkprovider.cpp. A remote attacker can perform MitM attack and gain unauthorized access to the system.
Affected software
KDE Connect iOS
KDE Connect
Debian Linux
Ubuntu
kdeconnect (Debian package)
kdeconnect (Ubuntu package)
gnome-shell-extension-gsconnect (Debian package)
KDE Connect
Debian Linux
Ubuntu
kdeconnect (Debian package)
kdeconnect (Ubuntu package)
gnome-shell-extension-gsconnect (Debian package)
How to mitigate CVE-2025-66270
Install updates from vendor's website.
kdeconnect (Debian package) - update to 25.04.2-1+deb13u1
kdeconnect (Ubuntu package) - update to 25.08.1-0ubuntu2.1
gnome-shell-extension-gsconnect (Debian package) - update to 62-1+deb13u1
kdeconnect (Ubuntu package) - update to 25.08.1-0ubuntu2.1
gnome-shell-extension-gsconnect (Debian package) - update to 62-1+deb13u1