What’s Vulnerable › Vulnerabilities

CVE-2023-2193: Oauth authorization codes do not expire when deauthorizing an oauth2 app

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-04-20 · updated 2026-06-17
• Weakness: CWE-862

Description

Mattermost fails to invalidate existing authorization codes when deauthorizing an OAuth2 app, allowing an attacker possessing an authorization code to generate an access token.

Affected products

• Mattermost App Framework: 7.1.7, 7.7.3, 7.8.2, 7.9.1

References

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

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