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CVE-2023-43754

4.3 mediumEPSS 0.5%

Medium (4.3) in mattermost mattermost. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost/server/v8 8.1.4, 9.0.2, 9.1.1.

Mattermost fails to check whether the  “Allow users to view archived channels”  setting is enabled during permalink previews display, allowing members to view permalink previews of archived channels even if the “Allow users to view archived channels” setting is disabled.

Severity

CVSS 3.1

4.3 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS
0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-31)
CWE
CWE-200
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-jjr7-372r-cx7xGogithub.com/mattermost/mattermost/server/v8>=9.1.0 <9.1.19.1.1
GHSA-jjr7-372r-cx7xGogithub.com/mattermost/mattermost/server/v8>=9.0.0 <9.0.29.0.2
GHSA-jjr7-372r-cx7xGogithub.com/mattermost/mattermost/server/v8<8.1.48.1.4
GHSA-jjr7-372r-cx7xGogithub.com/mattermost/mattermost-server/v6<7.8.137.8.13

References

Check your stackJSON