High
Security advisory
Mattermost versions 8.1.x before 8.1.10, 9.2.x before 9.2.6, 9.3.x before 9.3.2, and 9.4.x before 9.4.3 fail to correctly verify account ownership when switching from email to SAML authentication, allowing an authenticated attacker to take over other user accounts via a crafted switch request under specific conditions.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2024-2450
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 03:20 UTC · Revision 1
Source evidence
Mattermost versions 8.1.x before 8.1.10, 9.2.x before 9.2.6, 9.3.x before 9.3.2, and 9.4.x before 9.4.3 fail to correctly verify account ownership when switching from email to SAML authentication, allowing an authenticated attacker to take over other user accounts via a crafted switch request under specific conditions.
osv:CVE-2024-2450
Complete source record
{
"id": "8e88f91dc186e308a335d18a550fabe7ce449d5948d9cbc032b5962008888ebd",
"url": "https://osv.dev/vulnerability/CVE-2024-2450",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2024-2450",
"summary": "Mattermost versions 8.1.x before 8.1.10, 9.2.x before 9.2.6, 9.3.x before 9.3.2, and 9.4.x before 9.4.3 fail to correctly verify account ownership when switching from email to SAML authentication, allowing an authenticated attacker to take over other user accounts via a crafted switch request under specific conditions.",
"evidence": "osv:CVE-2024-2450",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2024-2450",
"aliases": [
"BIT-mattermost-2024-2450",
"CVE-2024-2450"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mattermost/mattermost",
"type": "GIT",
"events": [
{
"introduced": "096c9ea12a2144f832e330e9a0f4d3862ca20b9f"
},
{
"fixed": "674f549daf0e74933845be0ae32827e498137b63"
},
{
"introduced": "b47be1c0f5787562ddf430dd5c5b8b3c35748b06"
},
{
"fixed": "19f009e1ffa28d86a7a03bbcb6fec6a27368c7cd"
},
{
"introduced": "7bf5dcb8fb7f05db9a7a6a9be608ac0fe1405351"
},
{
"fixed": "80fef13a80f3eb2061462de28a5cd7f18caf8986"
},
{
"introduced": "baa88a2450d49dfea42990861283b5ed9d469edf"
},
{
"fixed": "472c1cd4d06083afd93cd3c6a3f1dc7476875b79"
},
{
"introduced": "99d819d25d0b16b3faed901b1fe5c41de7655e9c"
},
{
"last_affected": "99d819d25d0b16b3faed901b1fe5c41de7655e9c"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "8.1.0"
},
{
"fixed": "8.1.10"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.2.0"
},
{
"fixed": "9.2.6"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.3.0"
},
{
"fixed": "9.3.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.4.0"
},
{
"fixed": "9.4.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:9.5.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.5.0"
},
{
"last_affected": "9.5.0"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"9.5.0",
"v9.5.0-rc3",
"v9.5.0",
"@mattermost/types@9.5.0",
"@mattermost/client@9.5.0",
"v8.1.9",
"v9.2.5",
"v9.3.1",
"v9.3.1-rc2",
"v9.2.5-rc2",
"v8.1.9-rc2",
"v9.4.2-rc2",
"v9.4.2",
"v8.1.9-rc1",
"v9.2.5-rc1",
"v9.3.1-rc1",
"@mattermost/types@9.3.0",
"@mattermost/client@9.3.0",
"v9.4.2-rc1",
"v8.1.8",
"v9.2.4",
"v9.4.1",
"v9.4.0-rc4",
"v9.4.0",
"@mattermost/types@9.4.0",
"@mattermost/client@9.4.0",
"v8.1.8-rc2",
"v9.2.4-rc1",
"v8.1.8-rc1",
"v9.3.0-rc2",
"v9.3.0",
"v8.1.7-rc3",
"v8.1.7",
"v8.1.7-rc2",
"v9.2.3-rc1",
"v9.2.3",
"v8.1.7-rc1",
"v8.1.6-rc1",
"v8.1.6",
"v9.2.2",
"v8.1.5-rc2",
"v8.1.5",
"v8.1.5-rc1",
"v9.2.1",
"v9.2.0-rc2",
"v9.2.0",
"@mattermost/types@9.2.0",
"@mattermost/client@9.2.0",
"v8.1.4-rc2",
"v8.1.4",
"v8.1.4-rc1",
"v8.1.3-rc2",
"v8.1.3",
"v8.1.3-rc1",
"v8.1.2-rc2",
"v8.1.2",
"v8.1.2-rc1",
"v8.1.1-rc2",
"v8.1.1",
"@mattermost/types@8.1.1",
"@mattermost/client@8.1.1",
"v8.1.1-rc1",
"v8.1.0-rc2",
"v8.1.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-2450.json"
}
}
],
"modified": "2026-10-28T02:30:49.357755925Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/2xxx/CVE-2024-2450.json",
"https://nvd.nist.gov/vuln/detail/CVE-2024-2450"
],
"provider_metadata": {
"cwe_ids": [
"CWE-287"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "9.5.0"
},
{
"last_affected": "9.5.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandaloneSingleVersion"
}
]
},
{
"extracted_events": [
{
"range": [
{
"introduced": "9.4.0"
},
{
"last_affected": "9.4.2"
},
{
"introduced": "9.3.0"
},
{
"last_affected": "9.3.1"
},
{
"introduced": "9.2.0"
},
{
"last_affected": "9.2.5"
},
{
"introduced": "8.1.0"
},
{
"last_affected": "8.1.9"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/2xxx/CVE-2024-2450.json"
}
},
"related_cves": [
{
"value": "CVE-2024-2450",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 517702,
"published_at": "2024-03-15T09:12:28.88+00:00"
}