What is CVE-2022-1002?

CVE-2022-1002 is a low-severity vulnerability in Mattermost, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 2.0/10. Published 2022-03-18.

How severe is CVE-2022-1002?

Low severity. CVSS v3 base score is 2.0 out of 10.

XSS in Mattermost

CVE-2022-1002

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.

Published 2022-03-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.0 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (49.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Mattermost — versions unspecified

Weakness classification (CWE)

References

mattermost.com/security-updates/ (Release Notes, Vendor Advisory)
hackerone.com/reports/1443567 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-1002?: CVE-2022-1002 is a low-severity vulnerability in Mattermost, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 2.0/10. Published 2022-03-18.
How severe is CVE-2022-1002?: Low severity. CVSS v3 base score is 2.0 out of 10.