🛡️ CVE-2022-1002 — mattermost

🟢 CVSS 2.0 — Low ⚠️ Exploit Public CWE-80 NVD
2.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

Weakness class

CVE-2022-1002 is classified as CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream…

Affected software

CVE-2022-1002 is recorded against 1 package.

  • mattermost (fixed in 6.4.0)

Timeline and source

Published on 18 March 2022 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

hackerone.com
mattermost.com
hackerone.com
mattermost.com

Details

Severity LOW
CVSS Score 2.0
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N
CWE CWE-80
Public Exploit ⚠️ Yes
Source NVD
Published 2022-03-18
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
mattermost 6.4.0

References

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

Similar Threats

Exploit Protection

Are you running mattermost?

CVE-2022-1002 carries CVSS 2.0 Low rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

Check My Site For CVE-2022-1002 →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

Browse related advisories

All advisoriesCVECVE 2022