Medium severity5.3NVD Advisory· Published Jun 19, 2020· Updated Jun 17, 2026
CVE-2018-21257
CVE-2018-21257
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.
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Affected products
3cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: <5.1.0
- (no CPE)range: <5.1
Patches
Vulnerability mechanics
References
1- mattermost.com/security-updates/nvdVendor Advisory
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