GHSA-4g87-9x45-cx2h

Source

https://github.com/advisories/GHSA-4g87-9x45-cx2h

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-4g87-9x45-cx2h/GHSA-4g87-9x45-cx2h.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-4g87-9x45-cx2h

Aliases

CVE-2025-12559

Published

2025-11-27T18:30:25Z

Modified

2025-12-02T00:50:38.029826Z

Severity

4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator

Summary

Mattermost fails to sanitize team email addresses

Details

Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channelid}/commonteams endpoint

Database specific

{
    "nvd_published_at": "2025-11-27T17:15:46Z",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-200"
    ],
    "severity": "MODERATE",
    "github_reviewed_at": "2025-12-01T23:57:02Z"
}

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

8.0.0-20251015091448-abbf01b9db45

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

11.0.0

Fixed

11.0.3

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

10.12.0

Fixed

10.12.2

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

10.11.5

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

10.5.13