GHSA-3q4q-wqm6-hvf3

Suggest an improvement
Source
https://github.com/advisories/GHSA-3q4q-wqm6-hvf3
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-3q4q-wqm6-hvf3/GHSA-3q4q-wqm6-hvf3.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-3q4q-wqm6-hvf3
Aliases
Published
2025-10-16T09:30:24Z
Modified
2025-11-05T19:58:33Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
Mattermost has a Missing Authorization vulnerability
Details

Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions.

Database specific 
{
    "cwe_ids": [
        "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-10-16T21:00:44Z",
    "nvd_published_at": "2025-10-16T09:15:33Z",
    "severity": "MODERATE"
}
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
0 Unknown introduced version / All previous versions are affected
Fixed
8.0.0-20250822083415-01b95392a450

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-3q4q-wqm6-hvf3/GHSA-3q4q-wqm6-hvf3.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
10.10.0
Fixed
10.10.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/10/GHSA-3q4q-wqm6-hvf3/GHSA-3q4q-wqm6-hvf3.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-3q4q-wqm6-hvf3/GHSA-3q4q-wqm6-hvf3.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-3q4q-wqm6-hvf3/GHSA-3q4q-wqm6-hvf3.json"