CVE-2021-37863

low-risk

Published 2021-12-17

Mattermost 6.0 and earlier fails to sufficiently validate parameters during post creation, which allows authenticated attackers to cause a client-side crash of the web application via a maliciously crafted post.

Do I need to act?

0.57% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 3.5/10 Low

NETWORK / LOW complexity

Affected Products (1)

Mattermost Server

Affected Vendors

Mattermost

References (4)

Permissions Required https://hackerone.com/reports/1253732

Vendor Advisory https://mattermost.com/security-updates/

Permissions Required https://hackerone.com/reports/1253732

Vendor Advisory https://mattermost.com/security-updates/

/ 100

low-risk

Severity 16/34 · Moderate

Exploitability 2/34 · Minimal

Exposure 5/34 · Minimal