cve.bz

CVE-2017-18883

9.1 criticalEPSS 1.1%

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2, when serving as an OAuth 2.0 Service Provider. There is low entropy for authorization data.

Severity

CVSS 3.1

9.1 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
1.1% chance of exploitation in the next 30 days; higher than 66% of CVEs (scores of 2026-10-31)
CWE
CWE-331
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-w8cc-3h7q-jhc3Gogithub.com/mattermost/mattermost-server<4.1.24.1.2
GHSA-w8cc-3h7q-jhc3Gogithub.com/mattermost/mattermost-server>=4.2.0-rc1 <4.2.14.2.1
GHSA-w8cc-3h7q-jhc3Gogithub.com/mattermost/mattermost-server>=4.3.0-rc1 <4.3.04.3.0
GO-2025-4198Gogithub.com/mattermost/mattermost-server<4.1.2+incompatible
>=4.2.0-rc1+incompatible <4.2.1+incompatible
>=4.3.0-rc1+incompatible <4.3.0+incompatible		4.1.2+incompatible, 4.2.1+incompatible, 4.3.0+incompatible

References

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