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CVE-2024-39837

5.4 mediumEPSS 0.3%

Medium (5.4) in mattermost mattermost server. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost/server/v8 8.0.0-20240626164322-c758cecaf30c, 9.5.7, 9.9.1.

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled.

Severity

CVSS 3.1

5.4 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
EPSS
0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-31)
CWE
CWE-284
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-vvpg-55p7-5h8wGogithub.com/mattermost/mattermost/server/v8>=9.5.0 <9.5.79.5.7
GHSA-vvpg-55p7-5h8wGogithub.com/mattermost/mattermost/server/v8>=9.9.0 <9.9.19.9.1
GHSA-vvpg-55p7-5h8wGogithub.com/mattermost/mattermost/server/v8<8.0.0-20240626164322-c758cecaf30c8.0.0-20240626164322-c758cecaf30c
GHSA-vvpg-55p7-5h8wGogithub.com/mattermost/mattermost-server>=9.9.0 <9.9.19.9.1
GHSA-vvpg-55p7-5h8wGogithub.com/mattermost/mattermost-server/v5<5.3.2-0.20240626164322-c758cecaf30c5.3.2-0.20240626164322-c758cecaf30c
GHSA-vvpg-55p7-5h8wGogithub.com/mattermost/mattermost-server/v6<6.0.0-20240626164322-c758cecaf30c6.0.0-20240626164322-c758cecaf30c
GHSA-vvpg-55p7-5h8wGogithub.com/mattermost/mattermost-server>=9.5.0 <9.5.79.5.7
GO-2024-3032Gogithub.com/mattermost/mattermost-server>=9.5.0+incompatible <9.5.7+incompatible
>=9.9.0+incompatible <9.9.1+incompatible		9.5.7+incompatible, 9.9.1+incompatible
GO-2024-3032Gogithub.com/mattermost/mattermost-server/v5all versionsno fix published
GO-2024-3032Gogithub.com/mattermost/mattermost-server/v6all versionsno fix published
GO-2024-3032Gogithub.com/mattermost/mattermost/server/v8all versionsno fix published

References

Check your stackJSON