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MEDIUM · 4.3

CVE-2018-21256

An issue was discovered in Mattermost Server before 5.1. It allows attackers to bypass intended access restrictions (for group-message channel creation) via the Group message slash command.

Vulnerability Description

An issue was discovered in Mattermost Server before 5.1. It allows attackers to bypass intended access restrictions (for group-message channel creation) via the Group message slash command.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
MattermostMattermost Server< 5.1.0

Related Weaknesses (CWE)

CWE-732

References

FAQ

What is CVE-2018-21256?

CVE-2018-21256 is a vulnerability with a CVSS score of 4.3 (MEDIUM). An issue was discovered in Mattermost Server before 5.1. It allows attackers to bypass intended access restrictions (for group-message channel creation) via the Group message slash command.

How severe is CVE-2018-21256?

CVE-2018-21256 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2018-21256?

Check the references section above for vendor advisories and patch information. Affected products include: Mattermost Mattermost Server.