UpHeron
All vulnerabilities

Servers and applications

CVE-2017-18883

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2, when serving as an OAuth 2.0 Service Provider. There is low entropy for authorization data.

Severity
Critical 9.1
Published
19 Jun 2020
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.1.2, 4.2.1
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • Every version before 4.1.2
  • From 4.2.0 before 4.2.1
  • Version 4.3.0-rc1
  • Version 4.3.0-rc2
  • Version 4.3.0-rc3
  • Version 4.3.0-rc4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-18883
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-18883