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Fencer Vulns
medium 5.5

CVE-2023-43090 json

Gnome-shell: screenshot tool allows viewing open windows when session is locked

published 2023-09-22 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-47511

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits
0
none known

Summary

A vulnerability was found in GNOME Shell. GNOME Shell's lock screen allows an unauthenticated local user to view windows of the locked desktop session by using keyboard shortcuts to unlock the restricted functionality of the screenshot tool.

Patch / fix

  • gnome gnome-shell 43.9, 44.5
  • gnome-shell Debian 12 43.6-1~deb12u2
  • gnome-shell Debian 14, Debian 13 44.5-1

debian advisories DEBIAN-CVE-2023-43090

  • gnome-shell SLE Workstation Extension 15 SP6, SLE Module for Desktop Applications 15 SP6, openSUSE Leap 15.6 45.3-150600.5.6.1

suse advisories SUSE-SU-2024:2576-1

  • gnome-shell openSUSE Tumbleweed 45.0-2.1

opensuse advisories openSUSE-SU-2024:13251-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-43090 updated cvss 5.5

gnome-shell: Screenshot tool allows viewing open windows when session is locked

  • Red Hat Enterprise Linux 7 gnome-shell, gnome-shell-browser-plugin Red Hat Enterprise Linux 8 gnome-shell Red Hat Enterprise Linux 9 gnome-shell
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.gnome.org https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/6990 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

  • gnome gnome-shell

Classification

Weakness

References

Sources

Fencer Vulns 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.