GHSA-mp6x-97xj-9x62

Source

https://github.com/advisories/GHSA-mp6x-97xj-9x62

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-mp6x-97xj-9x62/GHSA-mp6x-97xj-9x62.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-mp6x-97xj-9x62

Aliases

Published

2025-11-27T18:30:26Z

Modified

2025-12-15T21:11:10Z

Severity

9.9 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator

Summary

Mattermost fails to to verify the token used during code exchange

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 to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email address used when switching authentication methods and sending a request to the /users/login/sso/code-exchange endpoint. The vulnerability requires ExperimentalEnableAuthenticationTransfer to be enabled (default: enabled) and RequireEmailVerification to be disabled (default: disabled).

Database specific

{
    "cwe_ids":  [
        "CWE-287",
        "CWE-303"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2025-12-01T23:57:10Z",
    "nvd_published_at":  "2025-11-27T18:15:46Z",
    "severity":  "CRITICAL"
}

References

Affected packages

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

0 Unknown introduced version / All previous versions are affected

Fixed

8.0.0-20251022210333-acda1fb5dd46

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-mp6x-97xj-9x62/GHSA-mp6x-97xj-9x62.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

11.0.0

Fixed

11.0.3

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-mp6x-97xj-9x62/GHSA-mp6x-97xj-9x62.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

10.12.0

Fixed

10.12.2

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-mp6x-97xj-9x62/GHSA-mp6x-97xj-9x62.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

10.11.5

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-mp6x-97xj-9x62/GHSA-mp6x-97xj-9x62.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

10.5.13

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-mp6x-97xj-9x62/GHSA-mp6x-97xj-9x62.json"