cve.bz

CVE-2017-18878

4.3 mediumEPSS 0.8%

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. Knowledge of a session ID allows revoking another user's session.

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
0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-31)
CWE
CWE-732
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-h564-6gc2-fcc6Gogithub.com/mattermost/mattermost-server<4.1.2-0.20171004201910-6be8113eb60c4.1.2-0.20171004201910-6be8113eb60c
GHSA-h564-6gc2-fcc6Gogithub.com/mattermost/mattermost-server>=4.2.0-rc1 <4.2.1-0.20171004192657-8fbbd688ea244.2.1-0.20171004192657-8fbbd688ea24
GHSA-h564-6gc2-fcc6Gogithub.com/mattermost/mattermost-server>=4.3.0-rc1 <4.3.04.3.0
GO-2025-4191Gogithub.com/mattermost/mattermost-server>=4.3.0-rc1+incompatible <4.3.0+incompatible4.3.0+incompatible

References

Check your stackJSON