UpHeron
All vulnerabilities

Servers and applications

CVE-2017-18911

An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. The X.509 certificate validation can be skipped for a TLS-based e-mail server.

Severity
Critical 9.1
Published
19 Jun 2020
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.6.7, 3.7.5, 3.8.2
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • Every version before 3.6.7
  • From 3.7.0 before 3.7.5
  • From 3.8.0 before 3.8.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-18911
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-18911