4.7

CVE-2025-66270: kde kde connect protocol Authentication Bypass by Spoofing

CVSS: 4.7v3.1MediumDeferred
AliasesUBUNTU-CVE-2025-66270USN-7905-1DEBIAN-CVE-2025-66270
Published 05-12-2025Last modified 05-12-2025
Open JSON

Vulnerability summary

CVE-2025-66270 is a medium (CVSS 4.7) Authentication Bypass by Spoofing vulnerability in kde kde connect protocol. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.3% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-12-2025
    PublishedVulnerability first disclosed.
  2. 05-12-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
  • gnome-shell-extension-gsconnect< 71-1 | < 62-1+deb13u1
  • kdeconnect< 25.11.80+git20251121.7090b106-1 | < 25.04.2-1+deb13u1
Ubuntu2 products
  • gnome-shell-extension-gsconnectAll versions (No fix recorded)
  • kdeconnect< 25.08.1-0ubuntu2.1
Kde1 product
Opensuse1 product
  • kdeconnect-kde&distro=openSUSE Tumbleweed< 25.11.90-1.1

4 vendors · 6 products

References

11 links
Show all 11 references