UpHeron
All vulnerabilities

Servers and applications

CVE-2021-37863

Mattermost 6.0 and earlier fails to sufficiently validate parameters during post creation, which allows authenticated attackers to cause a client-side crash of the web application via a maliciously crafted post.

Severity
Medium 5.7
Published
17 Dec 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • Every version up to 6.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-37863
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-37863