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CVE-2018-21258 High

Mattermost Server is vulnerable to a Denial of Service attack through `invite_people` command in github.com/mattermost/mattermost-server

Mattermost Server is vulnerable to a Denial of Service attack through `invite_people` command in github.com/mattermost/mattermost-server

Exploit probability 1.2%
Published November 25, 2025
Required by Not available
Last source change March 3, 2026

02 / AFFECTED SOFTWARE

Affected packages

Unknown Unknown

15 explicit affected versions

Go github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server/v5
Go github.com/mattermost/mattermost-server

03 / CONNECTIONS

Connected vulnerabilities

related OPENSUSE-SU-2026:21483-1

04 / EVIDENCE

Source records

Open Source Vulnerabilities CVE-2018-21258

An issue was discovered in Mattermost Server before 5.1. It allows attackers to cause a denial of service via the invite_people slash command.

View original source
Open Source Vulnerabilities GO-2025-4146

Mattermost Server is vulnerable to a Denial of Service attack through `invite_people` command in github.com/mattermost/mattermost-server

View original source
Open Source Vulnerabilities GHSA-5mh6-p63g-3mv5

An issue was discovered in Mattermost Server before 5.1.0. It allows attackers to cause a denial of service via the invite_people slash command.

View original source

05 / REFERENCES

Further evidence