Medium
Members Without Guest Invite Permissions Can Add Guests to Teams
Type: advisorySources: OSV
Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-3446
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 02:53 UTC · Revision 1
Source evidence
Members Without Guest Invite Permissions Can Add Guests to Teams
core-osv · Original sourcePublished 15 May 2025, 10:43 UTC
Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.
osv:CVE-2025-3446
Complete source record
{
"id": "bc9cd5c3d0376811bbd13596c4ed6427ab5708c54f8a82d572516ce9cfcd9399",
"url": "https://osv.dev/vulnerability/CVE-2025-3446",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Members Without Guest Invite Permissions Can Add Guests to Teams",
"summary": "Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.",
"evidence": "osv:CVE-2025-3446",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2025-3446",
"aliases": [
"CVE-2025-3446",
"GHSA-r7r2-m3vr-c8qc",
"GO-2025-3693"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mattermost/mattermost",
"type": "GIT",
"events": [
{
"introduced": "0bc2ddd42375a75ab14e63f038165150d4f07659"
},
{
"fixed": "e4fe8d850b9e004bd83bde62b925c33c93a80304"
},
{
"introduced": "7c8c0b7464fa9cd2fbfb97c65d1475b4be2e765c"
},
{
"fixed": "5309b12d92400b00822488c7ec92e40ea50aaae7"
},
{
"introduced": "58bd34fd34cbd7d3da777d627b6cffdf8a532930"
},
{
"fixed": "844447fbd57c8afc26431f7b200f44b02e0079cd"
},
{
"introduced": "5eebc77b68c0c2b63103316e3c92342c13fd93f9"
},
{
"fixed": "76ab3867b7857f6ae22f619a3d07bacdec6510c0"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.11.0"
},
{
"fixed": "9.11.12"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "10.4.0"
},
{
"fixed": "10.4.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "10.5.0"
},
{
"fixed": "10.5.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "10.6.0"
},
{
"fixed": "10.6.2"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v10.5.3-rc1",
"v10.6.2-rc1",
"v10.4.5-rc1",
"v9.11.12-rc1",
"v9.11.11-rc1",
"v9.11.11",
"v9.11.10",
"v10.4.4",
"v10.5.2",
"v10.6.1",
"v10.6.0-rc3",
"v10.6.0",
"mattermost-redux@10.6.0",
"@mattermost/types@10.6.0",
"@mattermost/client@10.6.0",
"v9.11.10-rc1",
"v9.11.9",
"v10.5.1",
"v10.4.3",
"v10.4.3-rc3",
"v10.5.1-rc2",
"v10.5.1-rc1",
"v9.11.9-rc2",
"v10.4.3-rc2",
"v9.11.9-rc1",
"v10.4.3-rc1",
"v10.5.0-rc6",
"v10.5.0",
"@mattermost/types@10.5.0",
"@mattermost/client@10.5.0",
"v9.11.8",
"v10.4.2",
"v9.11.7-rc3",
"v9.11.7",
"v10.4.1",
"v9.11.7-rc2",
"v10.4.0-rc3",
"v10.4.0",
"@mattermost/types@10.4.0",
"@mattermost/client@10.4.0",
"v9.11.7-rc1",
"v9.11.6",
"v9.11.6-rc2",
"v9.11.6-rc1",
"v9.11.5",
"v9.11.5-rc1",
"v9.11.4",
"v9.11.4-rc1",
"v9.11.3",
"v9.11.3-rc2",
"v9.11.3-rc1",
"v9.11.2",
"v9.11.2-rc2",
"v9.11.2-rc1",
"v9.11.1-rc1",
"v9.11.1",
"v9.11.0-rc3",
"v9.11.0",
"@mattermost/types@9.11.0",
"@mattermost/client@9.11.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-3446.json"
}
}
],
"modified": "2026-10-28T02:30:25.172458622Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/3xxx/CVE-2025-3446.json",
"https://nvd.nist.gov/vuln/detail/CVE-2025-3446"
],
"provider_metadata": {
"cwe_ids": [
"CWE-863"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "10.6.0"
},
{
"last_affected": "10.6.1"
},
{
"introduced": "10.5.0"
},
{
"last_affected": "10.5.2"
},
{
"introduced": "10.4.0"
},
{
"last_affected": "10.4.4"
},
{
"introduced": "9.11.0"
},
{
"last_affected": "9.11.11"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/3xxx/CVE-2025-3446.json"
}
},
"related_cves": [
{
"value": "CVE-2025-3446",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 492046,
"published_at": "2025-05-15T10:43:46.639+00:00"
}