CVE-2018-21257

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CVSS 3.1

5.3 medium

EPSS

<1%p55

Published

Jun 19, 2020 (Jun 19, 2020)

Modified

Jun 17, 2026

Description

An issue was discovered in Mattermost Server before 5.1. It allows attackers to bypass intended access restrictions (for setting a channel header) via the Channel header slash command API.

Vendors: mattermost
Products: mattermost server
Weakness: CWE-862
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.8%)

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