What’s Vulnerable › Vulnerabilities

CVE-2022-3147: Server-side Denial of Service while processing a specifically crafted JPEG file

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-09-09 · updated 2026-06-17
• Weakness: CWE-400

Description

Mattermost version 7.0.x and earlier fails to sufficiently limit the in-memory sizes of concurrently uploaded JPEG images, which allows authenticated users to cause resource exhaustion on specific system configurations, resulting in server-side Denial of Service.

Affected products

• Mattermost: before 7.1.0 — fixed in 7.1.0

How to fix

Upgrade to a fixed version: Mattermost 7.1.0. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/1549513
• https://mattermost.com/security-updates/
• https://hackerone.com/reports/1549513
• https://mattermost.com/security-updates/

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