Low
Creating posts with user-defined IDs permitted in CreatePost API
Type: advisorySources: OSV
Mattermost versions 9.8.0, 9.7.x <= 9.7.4, 9.6.x <= 9.6.2 and 9.5.x <= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2024-39361
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 15:07 UTC · Revision 1
Source evidence
Creating posts with user-defined IDs permitted in CreatePost API
core-osv · Original sourcePublished 3 Jul 2024, 08:35 UTC
Mattermost versions 9.8.0, 9.7.x <= 9.7.4, 9.6.x <= 9.6.2 and 9.5.x <= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts
osv:CVE-2024-39361
Complete source record
{
"id": "f079329def7aa0f4d6e0ead0fd59efb8cc6601b3840321352fbfa3dd0458499c",
"url": "https://osv.dev/vulnerability/CVE-2024-39361",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Creating posts with user-defined IDs permitted in CreatePost API",
"summary": "Mattermost versions 9.8.0, 9.7.x <= 9.7.4, 9.6.x <= 9.6.2 and 9.5.x <= 9.5.5 fail to prevent users from specifying a RemoteId for their posts which allows an attacker to specify both a remoteId and the post ID, resulting in creating a post with a user-defined post ID. This can cause some broken functionality in the channel or thread with user-defined posts",
"evidence": "osv:CVE-2024-39361",
"products": [],
"severity": "low",
"structured": {
"id": "CVE-2024-39361",
"aliases": [
"CVE-2024-39361"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mattermost/mattermost",
"type": "GIT",
"events": [
{
"introduced": "99d819d25d0b16b3faed901b1fe5c41de7655e9c"
},
{
"fixed": "01723a784c5ed96feb0f5c90518f8078ae798178"
},
{
"introduced": "9fc0f464a376499ca5859944483f09a32370a85a"
},
{
"fixed": "327e1a1dad176ab89e9f65ff30a92e77e770b21e"
},
{
"introduced": "7a9257d35b66fc46a7ac682dc6b720857c630ee9"
},
{
"fixed": "e5addb495b22f75da2ecaa214e7f492a4d39cd44"
},
{
"introduced": "015002180e109f0384c511a01dede846c549ce35"
},
{
"fixed": "6eb3d42f52be6d36ff6a931f2be44e3f7cdebe38"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.5.0"
},
{
"fixed": "9.5.6"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.6.0"
},
{
"fixed": "9.6.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.7.0"
},
{
"fixed": "9.7.4"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.8.0"
},
{
"fixed": "9.8.1"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v9.5.6-rc2",
"v9.6.3-rc2",
"v9.8.1-rc1",
"v9.5.6-rc1",
"v9.6.3-rc1",
"v9.5.5-rc1",
"v9.5.5",
"v9.8.0-rc4",
"v9.8.0",
"@mattermost/types@9.8.0",
"@mattermost/client@9.8.0",
"v9.7.3",
"v9.6.2-rc2",
"v9.6.2",
"v9.5.4-rc2",
"v9.5.4",
"v9.7.2-rc1",
"v9.7.2",
"v9.5.4-rc1",
"v9.6.2-rc1",
"v9.7.1",
"v9.7.0-rc3",
"v9.7.0",
"@mattermost/types@9.7.0",
"@mattermost/client@9.7.0",
"v9.5.3",
"v9.5.3-rc3",
"v9.6.1-rc3",
"v9.6.1",
"v9.5.3-rc2",
"v9.6.1-rc2",
"v9.5.3-rc1",
"v9.6.1-rc1",
"v9.5.2",
"v9.6.0-rc3",
"v9.6.0",
"@mattermost/types@9.6.0",
"@mattermost/client@9.6.0",
"v9.5.1-rc1",
"v9.5.1",
"v9.5.0-rc3",
"v9.5.0",
"@mattermost/types@9.5.0",
"@mattermost/client@9.5.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-39361.json"
}
}
],
"modified": "2026-10-28T02:30:36.742395474Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39361.json",
"https://nvd.nist.gov/vuln/detail/CVE-2024-39361"
],
"provider_metadata": {
"cwe_ids": [
"CWE-284"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "9.8.0"
},
{
"last_affected": "9.8.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandaloneSingleVersion"
}
]
},
{
"extracted_events": [
{
"range": [
{
"introduced": "9.7.0"
},
{
"last_affected": "9.7.4"
},
{
"introduced": "9.6.0"
},
{
"last_affected": "9.6.2"
},
{
"introduced": "9.5.0"
},
{
"last_affected": "9.5.5"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39361.json"
}
},
"related_cves": [
{
"value": "CVE-2024-39361",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 504007,
"published_at": "2024-07-03T08:35:43.118+00:00"
}