CVE-2018-21256
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2018-21256
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-21256.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2018-21256
- Published
- 2020-06-19T18:15:10.740Z
- Modified
- 2025-11-20T10:53:23.645504Z
- Severity
-
- 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
- Summary
- [none]
- Details
-
An issue was discovered in Mattermost Server before 5.1. It allows attackers to bypass intended access restrictions (for group-message channel creation) via the Group message slash command.
- References
Affected packages
Git / github.com/mattermost/mattermost-server
Affected ranges
- Type
- GIT
- Repo
- https://github.com/mattermost/mattermost-server
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
Affected versions
v0.*
v0.5.0
v0.6.0
v1.*
v1.0.0
v1.1.0
v1.1.1
v1.2.1
v1.3.0
v1.4.0
v2.*
v2.0.0
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.1.0
v3.2.0
v3.3.0
v3.4.0
v3.5.0
v3.5.1
v3.6.0
v3.6.1
v3.7.0
v3.7.1
v3.7.2
v3.7.3
v3.8.0
v4.*
v4.0.0
v4.0.1
v4.1.0
v4.10.0
v4.10.0-rc1
v4.10.0-rc2
v4.10.0-rc3
v4.10.0-rc4
v4.10.0-rc5
v4.2.0-rc1
v4.3.0
v4.3.0-rc1
v4.3.0-rc2
v4.3.0-rc3
v4.3.0-rc4
v4.4.0
v4.4.0-rc1
v4.4.0-rc2
v4.4.0-rc3
v4.4.0-rc4
v4.4.0-rc5
v4.5.0
v4.5.0-rc1
v4.5.0-rc2
v4.5.0-rc3
v4.5.0-rc4
v4.5.1
v4.5.1-rc1
v4.5.2
v4.5.2-rc1
v4.6.0
v4.6.0-rc1
v4.6.0-rc2
v4.6.0-rc3
v4.6.0-rc4
v4.6.0-rc5
v4.6.0-rc6
v4.7.0
v4.7.0-rc1
v4.7.0-rc2
v4.7.0-rc3
v4.7.0-rc4
v4.7.1
v4.7.1-rc1
v4.7.2
v4.7.2-rc1
v4.7.2-rc2
v4.7.2-rc3
v4.7.3
v4.7.3-rc1
v4.8.0
v4.8.0-rc1
v4.8.0-rc2
v4.8.0-rc3
v4.8.0-rc4
v4.8.0-rc5
v4.8.0-rc6
v4.9.0
v4.9.0-rc1
v4.9.0-rc2
v4.9.0-rc3
v4.9.0-rc4
v4.9.0-rc5
v4.9.0-rc6
v5.*
v5.0.0
v5.0.0-rc1
v5.0.0-rc2
v5.0.0-rc3
v5.0.0-rc4
v5.0.0-rc5
v5.0.0-rc6
v5.0.0-rc7
v5.0.1
v5.0.1-rc1
v5.1.0-rc1
v5.1.0-rc2
v5.1.0-rc3