Medium
Security advisory
An issue was discovered in Mattermost Server before 5.10.0, 5.9.1, 5.8.2, and 4.10.9. A non-member could change the Update/Patch Channel endpoint for a private channel.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-20869
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 05:40 UTC · Revision 1
Source evidence
An issue was discovered in Mattermost Server before 5.10.0, 5.9.1, 5.8.2, and 4.10.9. A non-member could change the Update/Patch Channel endpoint for a private channel.
osv:CVE-2019-20869
Complete source record
{
"id": "ed2d611b4e8c32b28b57bdb2e5557295ea4ddbbc72df07339c3f415afa30494a",
"url": "https://osv.dev/vulnerability/CVE-2019-20869",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-20869",
"summary": "An issue was discovered in Mattermost Server before 5.10.0, 5.9.1, 5.8.2, and 4.10.9. A non-member could change the Update/Patch Channel endpoint for a private channel.",
"evidence": "osv:CVE-2019-20869",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2019-20869",
"aliases": [
"CVE-2019-20869"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mattermost/mattermost",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "23bfd530da31cb835264928458607371dbfd962e"
},
{
"introduced": "7e5fda43bda67cd061e527b64046f241c2d6cc32"
},
{
"fixed": "3ff8ae8111f37a601af0a17af95feadc23a8f7ea"
},
{
"introduced": "24f11a12758fe75ce06269be7f9fb7bb790aec43"
},
{
"fixed": "b505a849aebc50f9bb89896a7a16c4aae437a0c2"
},
{
"introduced": "5ef499caae2bb751438b19151a9fcb4b27830bca"
},
{
"fixed": "c201065b4f25d4794ae86c077efb60c6f934fbc8"
},
{
"introduced": "abfe0a38d33825f6311b9a7ddc499d76f2e62e08"
},
{
"last_affected": "dc70ab42034da17eaf23be5a86abae81b3f1cd21"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.10.9"
}
],
"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": "5.8.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.9.0"
},
{
"fixed": "5.9.1"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.10.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "5.10.0-rc1"
},
{
"last_affected": "5.10.0-rc1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.10.0:rc2:*:*:*:*:*:*",
"range": [
{
"introduced": "5.10.0-rc2"
},
{
"last_affected": "5.10.0-rc2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.10.0:rc3:*:*:*:*:*:*",
"range": [
{
"introduced": "5.10.0-rc3"
},
{
"last_affected": "5.10.0-rc3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.10.0:rc4:*:*:*:*:*:*",
"range": [
{
"introduced": "5.10.0-rc4"
},
{
"last_affected": "5.10.0-rc4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.10.0:rc5:*:*:*:*:*:*",
"range": [
{
"introduced": "5.10.0-rc5"
},
{
"last_affected": "5.10.0-rc5"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:5.10.0:rc6:*:*:*:*:*:*",
"range": [
{
"introduced": "5.10.0-rc6"
},
{
"last_affected": "5.10.0-rc6"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"5.10.0-rc1",
"5.10.0-rc2",
"5.10.0-rc4",
"5.10.0-rc5",
"5.10.0-rc6",
"v5.10.1-rc1",
"v5.10.1",
"v5.10.0-rc6",
"v5.10.0",
"v4.10.8-rc1",
"v4.10.8",
"v5.9.0-rc4",
"v5.9.0",
"v5.8.1-rc2",
"v5.8.1",
"v5.10.0-rc5",
"v5.10.0-rc4",
"v5.10.0-rc3",
"v5.10.0-rc2",
"v5.10.0-rc1",
"v5.8.1-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-2019-20869.json"
}
}
],
"modified": "2026-10-24T10:30:32.142285248Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates/"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2019-20869",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 432945,
"published_at": "2020-06-19T16:15:10.483+00:00"
}