Authentication Bypass Affecting kdeconnect package, versions <25.08.1-0ubuntu2.1
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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Test your applications- Snyk IDSNYK-UBUNTU2510-KDECONNECT-14155613
- published2 Dec 2025
- disclosed5 Dec 2025
Introduced: 2 Dec 2025
CVE-2025-66270 (opens in a new tab)How to fix?
Upgrade Ubuntu:25.10 kdeconnect to version 25.08.1-0ubuntu2.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kdeconnect package and not the kdeconnect package as distributed by Ubuntu.
See How to fix? for Ubuntu:25.10 relevant fixed versions and status.
The KDE Connect protocol 8 before 2025-11-28 does not correlate device IDs across two packets. This affects KDE Connect before 25.12 on desktop, KDE Connect before 0.5.4 on iOS, KDE Connect before 1.34.4 on Android, GSConnect before 68, and Valent before 1.0.0.alpha.49.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2025-66270
- https://github.com/GSConnect/gnome-shell-extension-gsconnect/commit/a38246deec0af50ae218cdc51db32cdd7eb145e3
- https://github.com/andyholmes/valent/commit/85f773124a67ed1add79e7465bb088ec667cccce
- https://invent.kde.org/network/kdeconnect-android/-/commit/675d2d24a1eb95d15d9e5bde2b7e2271d5ada6a9
- https://invent.kde.org/network/kdeconnect-ios/-/commit/6c003c22d04270cabc4b262d399c753d55cf9080
- https://invent.kde.org/network/kdeconnect-kde/-/commit/4e53bcdd5d4c28bd9fefd114b807ce35d7b3373e
- https://kde.org/info/security/advisory-20251128-1.txt