High
Security advisory
An issue was discovered in Mattermost Server before 5.18.0, 5.17.2, 5.16.4, 5.15.4, and 5.9.7. CSRF can sometimes occur via a crafted web site for account takeover attacks.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-20841
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:27 UTC · Revision 1
Source evidence
An issue was discovered in Mattermost Server before 5.18.0, 5.17.2, 5.16.4, 5.15.4, and 5.9.7. CSRF can sometimes occur via a crafted web site for account takeover attacks.
osv:CVE-2019-20841
Complete source record
{
"id": "725e796296999581bb16dd716c902de1260dcbf37e812f6e6b161f54fc2ebc72",
"url": "https://osv.dev/vulnerability/CVE-2019-20841",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-20841",
"summary": "An issue was discovered in Mattermost Server before 5.18.0, 5.17.2, 5.16.4, 5.15.4, and 5.9.7. CSRF can sometimes occur via a crafted web site for account takeover attacks.",
"evidence": "osv:CVE-2019-20841",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2019-20841",
"aliases": [
"CVE-2019-20841"
],
"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": "1c81f4f5f7d6212d93a5bb8fc95c43252d22fc59"
},
{
"introduced": "f4f7fd0829d74fcd5e290fd1ba76845af18e553e"
},
{
"fixed": "0e3514cb61a6ce17d8e5edfad2c4793ab1cdec8a"
},
{
"introduced": "6597fdb40134965e26f715854dc85f5e6cfaa6df"
},
{
"fixed": "e16012435f82afafdfdd7963e95d86c9e8538322"
},
{
"introduced": "c81e4f87c20a717b1dc52b2b77780fa789e19148"
},
{
"fixed": "ca0518420b931db0923c97ec17e05e150a729a64"
},
{
"introduced": "20f13aa07eb468e29bc0dd1a52941cb7c4532ccb"
},
{
"last_affected": "cd38d63bf448ae791f252c3704a705e94b26959f"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "5.9.7"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.15.0"
},
{
"fixed": "5.15.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.16.0"
},
{
"fixed": "5.16.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.17.0"
},
{
"fixed": "5.17.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.18.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "5.18.0-rc1"
},
{
"last_affected": "5.18.0-rc1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.18.0:rc2:*:*:*:*:*:*",
"range": [
{
"introduced": "5.18.0-rc2"
},
{
"last_affected": "5.18.0-rc2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.18.0:rc3:*:*:*:*:*:*",
"range": [
{
"introduced": "5.18.0-rc3"
},
{
"last_affected": "5.18.0-rc3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.18.0:rc4:*:*:*:*:*:*",
"range": [
{
"introduced": "5.18.0-rc4"
},
{
"last_affected": "5.18.0-rc4"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"5.18.0-rc1",
"5.18.0-rc2",
"5.18.0-rc3",
"v5.18.0-rc4",
"v5.18.0-rc3",
"v5.18.0",
"v5.18.0-rc2",
"v5.15.3-rc1",
"v5.15.3",
"v5.15.2-rc2",
"v5.15.2-rc1",
"v5.15.2",
"v5.18.0-rc1",
"v5.9.6-rc1",
"v5.9.6",
"v5.16.3-rc1",
"v5.16.3",
"v5.17.1-rc1",
"v5.17.1",
"v5.17.0-rc4",
"v5.17.0-rc3",
"v5.17.0",
"v5.16.2-rc1",
"v5.16.2",
"v5.16.1-rc2",
"v5.16.1-rc1",
"v5.16.1",
"v5.9.5-rc1",
"v5.9.5",
"v5.15.1",
"v5.16.0-rc3",
"v5.16.0",
"v5.15.1-rc1",
"v5.15.0-rc4",
"v5.15.0",
"v5.9.4-rc1",
"v5.9.4",
"v5.9.3-rc1",
"v5.9.3",
"v5.9.2-rc1",
"v5.9.2",
"v5.9.1-rc1",
"v5.9.1",
"v5.9.0-rc4",
"v5.9.0",
"v5.9.0-rc3",
"v5.9.0-rc2",
"v5.9.0-rc1",
"v5.8.0-rc4",
"v5.8.0",
"v5.8.0-rc3",
"v5.8.0-rc2",
"v5.8.0-rc1",
"v5.2.0-rc2",
"v5.2.0-rc1",
"v5.1.0-rc1",
"v5.0.0-rc1",
"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-2019-20841.json"
}
}
],
"modified": "2026-10-24T10:30:53.675018949Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates/"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2019-20841",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 437970,
"published_at": "2020-06-19T14:15:10.307+00:00"
}