What’s Vulnerable › Vulnerabilities
CVE-2023-27266: Disclosure of team owner email address when when accessing the teams API
- Severity: low (CVSS 2.7 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: 2023-02-27 · updated 2026-06-17
- Weakness: CWE-200
Description
Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.
Affected products
- Mattermost: from 5.12.0 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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