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Authentication Bypass Affecting kdeconnect package, versions <25.11.80+git20251121.7090b106-1

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.2% (10th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-KDECONNECT-14124277
  • published27 Nov 2025
  • disclosed5 Dec 2025
Report a new vulnerability Found a mistake?

Introduced: 27 Nov 2025

CVE-2025-66270  (opens in a new tab)
CWE-290  (opens in a new tab)

How to fix?

Upgrade Debian:unstable kdeconnect to version 25.11.80+git20251121.7090b106-1 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 Debian. See How to fix? for Debian:unstable 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.