What’s Vulnerable › Vulnerabilities
CVE-2023-1421: Reflected XSS in OAuth flow completion endpoints
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-03-15 · updated 2026-06-17
- Weakness: CWE-79
Description
A reflected cross-site scripting vulnerability in the OAuth flow completion endpoints in Mattermost allows an attacker to send AJAX requests on behalf of the victim via sharing a crafted link with a malicious state parameter.
Affected products
- Mattermost: from 5.32.0 before 7.7.0 — fixed in 7.7.0
How to fix
Upgrade to a fixed version: Mattermost 7.7.0. Check the vendor advisory for mitigations.
References
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