What’s Vulnerable › Vulnerabilities

CVE-2023-5968: Password hash in response body after username update

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-06 · updated 2026-06-17
• Weakness: CWE-200

Description

Mattermost fails to properly sanitize the user object when updating the username, resulting in the password hash being included in the response body.

Affected products

• Mattermost App Framework: through 7.8.11; from 8.0.0 through 8.0.3; from 8.1.0 through 8.1.2; 9.0.0

References

• https://mattermost.com/security-updates
• https://mattermost.com/security-updates

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