CVE-2022-1002

5.4 mediumEPSS 0.7%

Mattermost 6.3.0 and earlier fails to properly sanitize the HTML content in the email invitation sent to guest users, which allows registered users with special permissions to invite guest users to inject unescaped HTML content in the email invitations.

Severity

CVSS 3.1

5.4 medium

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

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-31)
CWEs: CWE-79, CWE-80
Published: 2022-03-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mattermost:mattermost

References

https://hackerone.com/reports/1443567
https://mattermost.com/security-updates/
https://hackerone.com/reports/1443567
https://mattermost.com/security-updates/

Check your stack JSON