Medium
Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API
Type: advisorySources: OSV
Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked private channels including channel name, display name, and participant count through the run metadata API endpoint.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-47871
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 13:24 UTC · Revision 1
Source evidence
Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API
core-osv · Original sourcePublished 30 Jun 2025, 16:51 UTC
Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked private channels including channel name, display name, and participant count through the run metadata API endpoint.
osv:CVE-2025-47871
Complete source record
{
"id": "840b351b36e2984a8d7d0fdf34c2995cb4c6217d9854cc50e5c0e319c35a6159",
"url": "https://osv.dev/vulnerability/CVE-2025-47871",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API",
"summary": "Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked private channels including channel name, display name, and participant count through the run metadata API endpoint.",
"evidence": "osv:CVE-2025-47871",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2025-47871",
"aliases": [
"CVE-2025-47871",
"GHSA-wgvp-jj4w-88hf",
"GO-2025-3797"
],
"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": "96fdd2b677f28d1375df8dfa88bbc519f32bb3b6"
},
{
"introduced": "58bd34fd34cbd7d3da777d627b6cffdf8a532930"
},
{
"fixed": "2c4a9f9d49d9a6aa94b073e8871ff67e95f8984e"
},
{
"introduced": "5eebc77b68c0c2b63103316e3c92342c13fd93f9"
},
{
"fixed": "303cb88e93f0426657feb473b323d9e22dc0e43c"
},
{
"introduced": "f6b324a9d71843e8f48eba9e90dfbeabcbac1ae7"
},
{
"fixed": "5521da96cf8e84ff3f249ff0e3599d131c05e850"
},
{
"introduced": "bb105f3a2785636ad53b2d0bf4027900d41f6a67"
},
{
"last_affected": "b310742ad7ce8492533bdc764126a44c315ff7d6"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.11.0"
},
{
"fixed": "9.11.16"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "10.5.0"
},
{
"fixed": "10.5.6"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "10.6.0"
},
{
"fixed": "10.6.6"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "10.7.0"
},
{
"fixed": "10.7.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:10.8.0:-:*:*:*:*:*:*",
"range": [
{
"introduced": "10.8.0-NA"
},
{
"last_affected": "10.8.0-NA"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc3:*:*:*:*:*:*",
"range": [
{
"introduced": "10.8.0-rc3"
},
{
"last_affected": "10.8.0-rc3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "10.8.0-rc1"
},
{
"last_affected": "10.8.0-rc1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc2:*:*:*:*:*:*",
"range": [
{
"introduced": "10.8.0-rc2"
},
{
"last_affected": "10.8.0-rc2"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"10.8.0-NA",
"10.8.0-rc1",
"10.8.0-rc2",
"v10.6.5",
"v10.7.2",
"v10.6.4",
"v10.6.4-rc1",
"v10.7.2-rc1",
"v9.11.15",
"v10.5.5",
"v10.5.5-rc1",
"v9.11.14",
"v10.6.3",
"v10.5.4-rc2",
"v10.5.4",
"v9.11.13",
"v10.6.3-rc1",
"v10.5.4-rc1",
"v9.11.13-rc1",
"v10.7.1",
"v10.6.2",
"v10.5.3",
"v9.11.12",
"v10.5.3-rc1",
"v10.6.2-rc1",
"v9.11.12-rc1",
"v10.7.0-rc2",
"v10.7.0",
"mattermost-redux@10.7.0",
"@mattermost/types@10.7.0",
"@mattermost/client@10.7.0",
"v9.11.11-rc1",
"v9.11.11",
"v9.11.10",
"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",
"v10.5.1-rc2",
"v10.5.1-rc1",
"v9.11.9-rc2",
"v9.11.9-rc1",
"v10.5.0-rc6",
"v10.5.0",
"@mattermost/types@10.5.0",
"@mattermost/client@10.5.0",
"v9.11.8",
"v9.11.7-rc3",
"v9.11.7",
"v9.11.7-rc2",
"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-2025-47871.json"
}
}
],
"modified": "2026-10-28T02:30:50.718549894Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/47xxx/CVE-2025-47871.json",
"https://nvd.nist.gov/vuln/detail/CVE-2025-47871"
],
"provider_metadata": {
"cwe_ids": [
"CWE-863"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "10.8.0"
},
{
"last_affected": "10.8.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandaloneSingleVersion"
}
]
},
{
"extracted_events": [
{
"range": [
{
"introduced": "10.5.0"
},
{
"last_affected": "10.5.5"
},
{
"introduced": "9.11.0"
},
{
"last_affected": "9.11.15"
},
{
"introduced": "10.7.0"
},
{
"last_affected": "10.7.2"
},
{
"introduced": "10.6.0"
},
{
"last_affected": "10.6.5"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/47xxx/CVE-2025-47871.json"
}
},
"related_cves": [
{
"value": "CVE-2025-47871",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 519443,
"published_at": "2025-06-30T16:51:13.979+00:00"
}