GHSA-q453-638c-h4mr

Suggest an improvement
Source
https://github.com/advisories/GHSA-q453-638c-h4mr
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-q453-638c-h4mr/GHSA-q453-638c-h4mr.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-q453-638c-h4mr
Aliases
Published
2025-08-21T09:30:21Z
Modified
2025-08-29T20:58:14Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
Summary
Mattermost Fails to Validate Remote Cluster Upload Sessions
Details

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2, 10.10.x <= 10.10.0 fail to validate upload types in remote cluster upload sessions which allows a system admin to upload non-attachment file types via shared channels that could potentially be placed in arbitrary filesystem directories.

Database specific 
{
    "github_reviewed_at": "2025-08-21T16:03:07Z",
    "nvd_published_at": "2025-08-21T08:15:30Z",
    "cwe_ids": [
        "CWE-434"
    ],
    "severity": "MODERATE",
    "github_reviewed": true
}
References

Affected packages

Go
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
10.8.0
Fixed
10.8.4

Database specific

last_known_affected_version_range 
"<= 10.8.3"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-q453-638c-h4mr/GHSA-q453-638c-h4mr.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
10.5.9

Database specific

last_known_affected_version_range 
"<= 10.5.8"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-q453-638c-h4mr/GHSA-q453-638c-h4mr.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
9.11.0
Fixed
9.11.18

Database specific

last_known_affected_version_range 
"<= 9.11.17"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-q453-638c-h4mr/GHSA-q453-638c-h4mr.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
10.9.0
Fixed
10.9.3

Database specific

last_known_affected_version_range 
"<= 10.9.2"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-q453-638c-h4mr/GHSA-q453-638c-h4mr.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
10.10.1

Affected versions

10.*
10.10.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-q453-638c-h4mr/GHSA-q453-638c-h4mr.json"
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
8.0.0-20250708173752-d6b35c41f0ae5

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-q453-638c-h4mr/GHSA-q453-638c-h4mr.json"
github.com/mattermost/mattermost-server/v5

Package

Name
github.com/mattermost/mattermost-server/v5
View open source insights on deps.dev
Purl
pkg:golang/github.com/mattermost/mattermost-server/v5

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Last affected
5.39.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-q453-638c-h4mr/GHSA-q453-638c-h4mr.json"
github.com/mattermost/mattermost-server/v6

Package

Name
github.com/mattermost/mattermost-server/v6
View open source insights on deps.dev
Purl
pkg:golang/github.com/mattermost/mattermost-server/v6

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Last affected
5.7.2

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-q453-638c-h4mr/GHSA-q453-638c-h4mr.json"