GHSA-v647-h8jj-fw5r
GitHub Security Advisory
Mattermost Data Amplification vulnerability
✓ GitHub Reviewed
MODERATE
Has CVE
Advisory Details
Mattermost versions 10.1.x <= 10.1.2, 10.0.x <= 10.0.2, 9.11.x <= 9.11.4, 9.5.x <= 9.5.12 fail to limit the file size for slack import file uploads which allows a user to cause a DoS via zip bomb by importing data in a team they are a team admin.
Affected Packages
Go
github.com/mattermost/mattermost/server/v8
Affected versions:
10.1.0
(fixed in 10.1.3)
Go
github.com/mattermost/mattermost/server/v8
Affected versions:
10.0.0
(fixed in 10.0.3)
Go
github.com/mattermost/mattermost/server/v8
Affected versions:
9.11.0
(fixed in 9.11.5)
Go
github.com/mattermost/mattermost/server/v8
Affected versions:
9.5.0
(fixed in 9.5.13)
Related CVEs
Key Information
5.0
/10
Dataset
Last updated: August 1, 2025 6:44 AM
Data from GitHub Advisory Database. This information is provided for research and educational purposes.