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Case File

CVE-2018-21257

MEDIUM · CVSS 5.3 EPSS 0.81%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2020-06-19 · Last synced 2026-08-04

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CVE
CVE-2018-21257
Severity
MEDIUM
CVSS
5.3
EPSS
0.81%

Original NVD 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.