What’s Vulnerable › Vulnerabilities
CVE-2023-3613: Guest accounts invited and added to channels by Welcomebot plugin
- Severity: low (CVSS 3.5 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: 2023-07-17 · updated 2026-06-17
- Weakness: CWE-863
Description
Mattermost WelcomeBot plugin fails to to validate the membership status when inviting or adding users to channels allowing guest accounts to be added or invited to channels by default.
Affected products
- Mattermost: before 7.8.6; from 7.9.0 before 7.10.3 — fixed in 7.10.3, 7.8.6
How to fix
Upgrade to a fixed version: Mattermost 7.10.3, 7.8.6. Check the vendor advisory for mitigations.
References
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