What’s Vulnerable › Vulnerabilities

CVE-2022-4019: Authenticated user could send multiple requests containing a large payload to a Playbooks API and can crash a Mattermost server

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-23 · updated 2026-06-17
• Weakness: CWE-770

Description

A denial-of-service vulnerability in the Mattermost Playbooks plugin allows an authenticated user to crash the server via multiple large requests to one of the Playbooks API endpoints.

Affected products

• Mattermost App Framework: all versions

References

• https://hackerone.com/reports/1685979
• https://mattermost.com/security-updates/
• https://hackerone.com/reports/1685979
• https://mattermost.com/security-updates/

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