Medium
Security advisory
An issue was discovered in Mattermost Server before 5.9.0, 5.8.1, 5.7.3, and 4.10.8. It allows attackers to obtain sensitive information during user activation/deactivation.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-20873
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:52 UTC · Revision 1
Source evidence
An issue was discovered in Mattermost Server before 5.9.0, 5.8.1, 5.7.3, and 4.10.8. It allows attackers to obtain sensitive information during user activation/deactivation.
osv:CVE-2019-20873
Complete source record
{
"id": "cf064cb9f8d4aca1c713f65b6690df4b603ffc4958358f708927fb0ce66fdf52",
"url": "https://osv.dev/vulnerability/CVE-2019-20873",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-20873",
"summary": "An issue was discovered in Mattermost Server before 5.9.0, 5.8.1, 5.7.3, and 4.10.8. It allows attackers to obtain sensitive information during user activation/deactivation.",
"evidence": "osv:CVE-2019-20873",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2019-20873",
"aliases": [
"CVE-2019-20873"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mattermost/mattermost",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "e1b0373e5e3283449f0e40a4b6c59f083da2f16e"
},
{
"introduced": "7e5fda43bda67cd061e527b64046f241c2d6cc32"
},
{
"fixed": "3ff8ae8111f37a601af0a17af95feadc23a8f7ea"
},
{
"introduced": "24f11a12758fe75ce06269be7f9fb7bb790aec43"
},
{
"fixed": "f1414dd14a5d282102a9261ec24c2e6b6a83ffe1"
},
{
"introduced": "c25b7fc6484760bd7a608335b49c56f0a52f27ec"
},
{
"last_affected": "5ef499caae2bb751438b19151a9fcb4b27830bca"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.10.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.7.0"
},
{
"fixed": "5.7.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.8.0"
},
{
"fixed": "5.8.1"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.9.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "5.9.0-rc1"
},
{
"last_affected": "5.9.0-rc1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.9.0:rc2:*:*:*:*:*:*",
"range": [
{
"introduced": "5.9.0-rc2"
},
{
"last_affected": "5.9.0-rc2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.9.0:rc3:*:*:*:*:*:*",
"range": [
{
"introduced": "5.9.0-rc3"
},
{
"last_affected": "5.9.0-rc3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.9.0:rc4:*:*:*:*:*:*",
"range": [
{
"introduced": "5.9.0-rc4"
},
{
"last_affected": "5.9.0-rc4"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"5.9.0-rc1",
"5.9.0-rc2",
"5.9.0-rc3",
"5.9.0-rc4",
"v5.9.0-rc4",
"v5.9.0",
"v5.9.0-rc3",
"v5.8.1-rc1",
"v5.9.0-rc2",
"v5.9.0-rc1",
"v4.10.7-rc1",
"v4.10.7",
"v5.7.2-rc1",
"v5.7.2",
"v5.8.0-rc4",
"v5.8.0",
"v4.10.6-rc1",
"v4.10.6",
"v5.7.1-rc1",
"v5.7.1",
"v5.7.0-rc6",
"v5.7.0",
"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-2019-20873.json"
}
}
],
"modified": "2026-10-24T10:30:33.611792609Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates/"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2019-20873",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 433331,
"published_at": "2020-06-19T16:15:10.767+00:00"
}