CVE-2021-37862

low-risk

Published 2021-12-17

Mattermost 6.0 and earlier fails to sufficiently validate the email address during registration, which allows attackers to trick users into signing up using attacker-controlled email addresses via crafted invitation token.

Do I need to act?

0.17% 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 3.7/10 Low

NETWORK / HIGH complexity

Affected Products (1)

Mattermost Server

Affected Vendors

Mattermost

References (4)

Permissions Required https://hackerone.com/reports/1357013

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

Permissions Required https://hackerone.com/reports/1357013

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

/ 100

low-risk

Severity 13/34 · Low

Exploitability 1/34 · Minimal

Exposure 5/34 · Minimal