What’s Vulnerable › Vulnerabilities
CVE-2023-1774: Unauthorized email invite to a private channel
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-03-31 · updated 2026-06-17
- Weakness: CWE-862
Description
When processing an email invite to a private channel on a team, Mattermost fails to validate the inviter's permission to that channel, allowing an attacker to invite themselves to a private channel.
Affected products
- Mattermost: before 7.1.6; 7.7.1 — fixed in 7.1.6
How to fix
Upgrade to a fixed version: Mattermost 7.1.6. Check the vendor advisory for mitigations.
References
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