High
Security advisory
An issue was discovered in Mattermost Server before 5.12.0, 5.11.1, 5.10.2, 5.9.2, and 4.10.10. The login page allows CSRF.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-20865
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:37 UTC · Revision 1
Source evidence
An issue was discovered in Mattermost Server before 5.12.0, 5.11.1, 5.10.2, 5.9.2, and 4.10.10. The login page allows CSRF.
osv:CVE-2019-20865
Complete source record
{
"id": "c205e59e9271d46159ca6b9874147e48cfb95c733fcf18840c32392796391ac5",
"url": "https://osv.dev/vulnerability/CVE-2019-20865",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-20865",
"summary": "An issue was discovered in Mattermost Server before 5.12.0, 5.11.1, 5.10.2, 5.9.2, and 4.10.10. The login page allows CSRF.",
"evidence": "osv:CVE-2019-20865",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2019-20865",
"aliases": [
"CVE-2019-20865"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mattermost/mattermost",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "c7d82e1b29cc8ed70b9f625accecb2ac6d441e3c"
},
{
"introduced": "5ef499caae2bb751438b19151a9fcb4b27830bca"
},
{
"fixed": "9a9c8aff3c08089c6ae3ece282941608105732ef"
},
{
"introduced": "dc70ab42034da17eaf23be5a86abae81b3f1cd21"
},
{
"fixed": "ef41fcf4a0c3d74085bccef32e3918c1b272c695"
},
{
"introduced": "692d1be91eafb64328ce21bcd18671288eb5139b"
},
{
"fixed": "22c17d58df3e1cfb022c245c6b251283b5594543"
},
{
"introduced": "6b643983174dd755c922706e47f1ee8d27f3469c"
},
{
"last_affected": "bfd66aa445a2df8c6ed6ba9f2567021ecf6c9f3b"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.10.10"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.9.0"
},
{
"fixed": "5.9.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.10.0"
},
{
"fixed": "5.10.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.11.0"
},
{
"fixed": "5.11.1"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.12.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "5.12.0-rc1"
},
{
"last_affected": "5.12.0-rc1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.12.0:rc2:*:*:*:*:*:*",
"range": [
{
"introduced": "5.12.0-rc2"
},
{
"last_affected": "5.12.0-rc2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.12.0:rc3:*:*:*:*:*:*",
"range": [
{
"introduced": "5.12.0-rc3"
},
{
"last_affected": "5.12.0-rc3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.12.0:rc4:*:*:*:*:*:*",
"range": [
{
"introduced": "5.12.0-rc4"
},
{
"last_affected": "5.12.0-rc4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.12.0:rc5:*:*:*:*:*:*",
"range": [
{
"introduced": "5.12.0-rc5"
},
{
"last_affected": "5.12.0-rc5"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.12.0:rc6:*:*:*:*:*:*",
"range": [
{
"introduced": "5.12.0-rc6"
},
{
"last_affected": "5.12.0-rc6"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"5.12.0-rc1",
"5.12.0-rc2",
"5.12.0-rc3",
"5.12.0-rc4",
"5.12.0-rc5",
"5.12.0-rc6",
"v5.12.0-rc6",
"v5.12.0",
"v5.12.0-rc5",
"v5.12.0-rc4",
"v5.9.1-rc1",
"v5.9.1",
"v5.12.0-rc3",
"v4.10.9",
"v5.10.1-rc1",
"v5.10.1",
"v5.10.0-rc6",
"v5.10.0",
"v5.11.0-rc3",
"v5.11.0",
"v5.12.0-rc2",
"v5.12.0-rc1",
"v4.10.8-rc1",
"v4.10.8",
"v5.9.0-rc4",
"v5.9.0",
"v4.10.7-rc1",
"v4.10.7",
"v4.10.6-rc1",
"v4.10.6",
"v4.10.5-rc1",
"v4.10.5",
"v4.10.4-rc1",
"v4.10.4",
"v4.10.3-rc1",
"v4.10.3",
"v4.10.2-rc1",
"v4.10.2",
"v4.10.1-rc1",
"v4.10.1",
"v4.10.0-rc5",
"v4.10.0-rc4",
"v4.10.0",
"v4.10.0-rc3",
"v4.10.0-rc2",
"v4.10.0-rc1",
"v4.9.0-rc1",
"v4.8.0-rc1",
"v4.7.0-rc1",
"v4.6.0-rc2",
"v4.6.0-rc1",
"v4.5.0-rc1",
"v4.4.0-rc1",
"v4.3.0-rc1",
"v4.2.0-rc1",
"v0.5.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-20865.json"
}
}
],
"modified": "2026-10-24T10:30:55.814755780Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates/"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2019-20865",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 438507,
"published_at": "2020-06-19T16:15:10.203+00:00"
}