Medium
Security advisory
An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, and 4.3.4. It mishandled webhook access control in the EnableOnlyAdminIntegrations case.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2017-18870
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 06:09 UTC · Revision 1
Source evidence
An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, and 4.3.4. It mishandled webhook access control in the EnableOnlyAdminIntegrations case.
osv:CVE-2017-18870
Complete source record
{
"id": "d182a8ed1a20413a7c014c08e601b1101e7c6f84cb5d89001dbc05f55e3f8b24",
"url": "https://osv.dev/vulnerability/CVE-2017-18870",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2017-18870",
"summary": "An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, and 4.3.4. It mishandled webhook access control in the EnableOnlyAdminIntegrations case.",
"evidence": "osv:CVE-2017-18870",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2017-18870",
"aliases": [
"CVE-2017-18870",
"GHSA-9j9j-mm2r-9rfm",
"GO-2025-4183"
],
"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": "0"
},
{
"fixed": "8f6bb1570dd234c63de5241eff9fbb268aad358c"
},
{
"introduced": "a0017f184578d4d6250a9b54b50e656524078949"
},
{
"fixed": "3890bc7079bf21330efdc45ae2741a4392d99e3c"
},
{
"introduced": "5358b9c42cc99f72e7844062f28b2ddc3642a339"
},
{
"last_affected": "03f5c939deb4a6ab2fd01639b5570799e4118bab"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.3.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "4.5.0-rc1"
},
{
"last_affected": "4.5.0-rc1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc2:*:*:*:*:*:*",
"range": [
{
"introduced": "4.5.0-rc2"
},
{
"last_affected": "4.5.0-rc2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc3:*:*:*:*:*:*",
"range": [
{
"introduced": "4.5.0-rc3"
},
{
"last_affected": "4.5.0-rc3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:4.5.0:rc4:*:*:*:*:*:*",
"range": [
{
"introduced": "4.5.0-rc4"
},
{
"last_affected": "4.5.0-rc4"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"4.5.0-rc1",
"4.5.0-rc2",
"v4.5.2-rc1",
"v4.5.2",
"v4.5.1-rc1",
"v4.5.1",
"v4.5.0-rc4",
"v4.5.0-rc3",
"v4.5.0-rc2",
"v4.5.0",
"v4.5.0-rc1",
"v4.4.3-rc1",
"v4.4.3",
"v4.4.2-rc1",
"v4.4.2",
"v4.3.2-rc1",
"v4.3.2",
"v4.4.1-rc1",
"v4.4.1",
"v4.4.0-rc5",
"v4.4.0-rc4",
"v4.4.0",
"v4.3.1-rc2",
"v4.3.1",
"v4.3.1-rc1",
"v4.3.0-rc4",
"v4.3.0-rc3",
"v4.3.0",
"v4.3.0-rc2",
"v4.3.0-rc1",
"v4.2.0-rc1",
"v0.5.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-18870.json"
}
}
],
"modified": "2026-10-24T10:30:36.049816930Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates/"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2017-18870",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 433886,
"published_at": "2020-06-19T17:15:11.787+00:00"
}