🛡️ CVE-2025-66270 on Ubuntu — gnome-shell-extension-gsconnect

Distribution advisory

This page covers CVE-2025-66270 as tracked by Ubuntu, for the package gnome-shell-extension-gsconnect. The fix is available in version 25.08.1-0ubuntu2.1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached from an adjacent network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

• Attack vector: Adjacent network — the attacker has to sit on the same local or logical network.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Changed — a successful attack reaches components beyond the vulnerable one.
• Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
• Integrity impact: Low — limited, and the attacker does not choose what is affected.
• Availability impact: None.

Weakness class

UBUNTU-CVE-2025-66270 is classified as CWE-290: Authentication Bypass by Spoofing. Identity is inferred from something an attacker can forge, such as a header or address.

Affected software

UBUNTU-CVE-2025-66270 is recorded against 2 packages.

• gnome-shell-extension-gsconnect
• kdeconnect (fixed in 25.08.1-0ubuntu2.1)

Timeline and source

Published on 27 November 2025 and last revised on 4 February 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
ubuntu.com (Advisory)
kde.org (Report)

Other advisories for this package

gnome-shell-extension-gsconnect has other advisories on record. If you are patching this one, these are worth checking on the same host:

• DEBIAN-CVE-2025-32900 (published 5 Dec 2025)
• DEBIAN-CVE-2025-32898 (published 5 Dec 2025)
• UBUNTU-CVE-2025-32898 (published 5 Dec 2025)
• DEBIAN-CVE-2025-66270 (published 5 Dec 2025)
• DSA-6066-1 (published 30 Nov 2025)

Same weakness in other software

These advisories are the same class of weakness (CWE-290: Authentication Bypass by Spoofing) in other software:

• CVE-2026-14450 (9.9 Critical, published 10 Aug 2026)
• CVE-2026-32469 (5.3 Medium, published 6 Aug 2026)
• CVE-2026-65570 (8.1 High, published 6 Aug 2026)
• CVE-2026-65502 (5.3 Medium, published 6 Aug 2026)
• CVE-2026-48063 (9.5 Critical, published 3 Aug 2026)
• CVE-2026-14840 (5.3 Medium, published 1 Aug 2026)
• CVE-2026-13143 (5.3 Medium, published 30 Jul 2026)
• CVE-2026-28812 (9.8 Critical, published 30 Jul 2026)

CVE-2025-66270 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Affected Packages

References