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CVE-2023-5967

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/v6 7.8.12.

Mattermost fails to properly validate requests to the Calls plugin, allowing an attacker sending a request without a User Agent header to cause a panic and crash the Calls plugin

Severity

CVSS 3.1

4.3 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
EPSS
0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-31)
CWE
CWE-754
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-xvq6-h898-wcj8Gogithub.com/mattermost/mattermost-server/v6<7.8.127.8.12
GHSA-xvq6-h898-wcj8Gogithub.com/mattermost/mattermost/server/v8>=8.0.0 <8.0.48.0.4
GHSA-xvq6-h898-wcj8Gogithub.com/mattermost/mattermost/server/v8>=8.1.0 <8.1.38.1.3
GHSA-xvq6-h898-wcj8Gogithub.com/mattermost/mattermost/server/v8>=9.0.0 <9.0.19.0.1

References

Check your stackJSON