GHSA-vvpg-55p7-5h8w
GitHub Security Advisory
Mattermost did not properly restrict channel creation
✓ GitHub Reviewed
LOW
Has CVE
Advisory Details
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled.
Affected Packages
Go
github.com/mattermost/mattermost/server/v8
Affected versions:
9.5.0
(fixed in 9.5.7)
Go
github.com/mattermost/mattermost/server/v8
Affected versions:
9.9.0
(fixed in 9.9.1)
Go
github.com/mattermost/mattermost/server/v8
Affected versions:
0
(fixed in 8.0.0-20240626164322-c758cecaf30c)
Go
github.com/mattermost/mattermost-server
Affected versions:
9.9.0
(fixed in 9.9.1)
Go
github.com/mattermost/mattermost-server/v5
Affected versions:
0
(fixed in 5.3.2-0.20240626164322-c758cecaf30c)
Go
github.com/mattermost/mattermost-server/v6
Affected versions:
0
(fixed in 6.0.0-20240626164322-c758cecaf30c)
Go
github.com/mattermost/mattermost-server
Affected versions:
9.5.0
(fixed in 9.5.7)
Related CVEs
Key Information
2.5
/10
Dataset
Last updated: August 2, 2025 6:46 AM
Data from GitHub Advisory Database. This information is provided for research and educational purposes.