CVE-2025-66270 json
The KDE Connect protocol 8 before 2025-11-28 does not correlate device IDs across two packets.
published 11mo ago modified 22d ago also EUVD-2025-201386
- cvss
- 4.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- kdeconnect Debian 13 25.04.2-1+deb13u1
- kdeconnect Debian 14 25.11.80+git20251121.7090b106-1
- gnome-shell-extension-gsconnect Debian 13 62-1+deb13u1
- gnome-shell-extension-gsconnect Debian 14 71-1
debian advisories DEBIAN-CVE-2025-66270
- kdeconnect Ubuntu 25.10 25.08.1-0ubuntu2.1
ubuntu advisories UBUNTU-CVE-2025-66270
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- kdeconnect-kde openSUSE Tumbleweed 25.11.90-1.1
opensuse advisories openSUSE-SU-2025:15800-1
Is CVE-2025-66270 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11mo ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.7 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- KDE KDE Connect protocol
Classification
- Weakness
-
- CWE-290 Authentication Bypass by Spoofing
References
- invent.kde.org /network/kdeconnect-kde/-/commit/4e53bcdd5d4c28bd9fefd114b807ce35d7b3373e
- invent.kde.org /network/kdeconnect-android/-/commit/675d2d24a1eb95d15d9e5bde2b7e2271d5ada6a9
- invent.kde.org /network/kdeconnect-ios/-/commit/6c003c22d04270cabc4b262d399c753d55cf9080
- github.com /GSConnect/gnome-shell-extension-gsconnect/commit/a38246deec0af50ae218cdc51db32cdd7eb145e3
- github.com /andyholmes/valent/commit/85f773124a67ed1add79e7465bb088ec667cccce
- kde.org /info/security/advisory-20251128-1.txt
Sources
- CVE List CVE-2025-66270
- NVD CVE-2025-66270
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.