CVE-2023-3613

3.5 lowEPSS 0.3%

Low (3.5) in mattermost mattermost server. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

3.5 low

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
CWE: CWE-863
Published: 2023-07-17
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mattermost:mattermost_server

References

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

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