GHSA-424h-xj87-m937

Suggest an improvement
Source
https://github.com/advisories/GHSA-424h-xj87-m937
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-424h-xj87-m937/GHSA-424h-xj87-m937.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-424h-xj87-m937
Aliases
Published
2025-10-16T09:30:24Z
Modified
2025-11-05T19:57:40.443090Z
Severity
  • 3.1 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
Mattermost has an Incorrect Authorization vulnerability
Details

Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the /api/v4/channels/{channel_id}/members endpoint

Database specific 
{
    "nvd_published_at": "2025-10-16T09:15:33Z",
    "cwe_ids": [
        "CWE-863"
    ],
    "github_reviewed_at": "2025-10-16T20:59:09Z",
    "severity": "LOW",
    "github_reviewed": true
}
References

Affected packages

Go
github.com/mattermost/mattermost/server/v8

Package

Name
github.com/mattermost/mattermost/server/v8
View open source insights on deps.dev
Purl
pkg:golang/github.com/mattermost/mattermost/server/v8

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
8.0.0-20250820115038-ff30b84049f0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-424h-xj87-m937/GHSA-424h-xj87-m937.json"
github.com/mattermost/mattermost-server

Package

Name
github.com/mattermost/mattermost-server
View open source insights on deps.dev
Purl
pkg:golang/github.com/mattermost/mattermost-server

Affected ranges

Type
SEMVER
Events
Introduced
10.5.0
Fixed
10.5.11

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-424h-xj87-m937/GHSA-424h-xj87-m937.json"
github.com/mattermost/mattermost-server

Package

Name
github.com/mattermost/mattermost-server
View open source insights on deps.dev
Purl
pkg:golang/github.com/mattermost/mattermost-server

Affected ranges

Type
SEMVER
Events
Introduced
10.11.0
Fixed
10.11.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-424h-xj87-m937/GHSA-424h-xj87-m937.json"