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CVE-2023-43090

18
FAUCET Score

CVE-2023-43090 is a medium-severity vulnerability in GNOME Shell, affecting Fedora and other GNOME-based systems. It allows an unauthenticated local user to bypass the lock screen and view the locked desktop session's windows by manipulating keyboard shortcuts to access restricted screenshot functionality. The vulnerability has a CVSS score of 5.5 (medium), indicating local access with low attack complexity and high confidentiality impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 43, < 43.9CPE matchmatch criteria
cpe:2.3:a:gnome:gnome-shell:*:*:*:*:*:*:*:*
>= 44, < 44.5CPE matchmatch criteria
cpe:2.3:a:gnome:gnome-shell:*:*:*:*:*:*:*:*
42CPE matchmatch criteria
cpe:2.3:a:gnome:gnome-shell:42:*:*:*:*:*:*:*
37CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
38CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.31%
Probability of exploitation in next 30 days
EPSS Percentile
23.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0031 is in the 80th percentile among its peer group of 15,938 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2023-43090Moderate

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

Sep 15, 2023

References

access.redhat.com / security/cve/CVE-2023-43090
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
gitlab.gnome.org / GNOME/gnome-shell/-/issues/6990
ExploitIssue TrackingPatchVendor Advisory
gitlab.gnome.org / GNOME/gnome-shell/-/merge_requests/2944
PatchVendor Advisory