UpHeron
All vulnerabilities

Servers and applications

CVE-2017-18894

An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5, when used as an OAuth 2.0 service provider. Sometimes. resource-owner authorization is bypassed, allowing account takeover.

Severity
High 8.1
Published
19 Jun 2020
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.0.5, 4.1.1
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • Every version before 4.0.5
  • From 4.1.0 before 4.1.1
  • Version 4.2.0-rc1
  • Version 4.2.0-rc2
  • Version 4.2.0-rc3
  • Version 4.2.0-rc4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-18894
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-18894