CVE-2018-21258

7.5 highEPSS 1.2%

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.

Severity

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 1.2% chance of exploitation in the next 30 days; higher than 67% of CVEs (scores of 2026-10-31)
CWE: CWE-74
Published: 2020-06-19
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-5mh6-p63g-3mv5	Go	github.com/mattermost/mattermost-server	<5.1.0	5.1.0
GO-2025-4146	Go	github.com/mattermost/mattermost-server	all versions	no fix published
GO-2025-4146	Go	github.com/mattermost/mattermost-server/v5	<5.1.0	5.1.0