Medium
Slack import bypasses email verification for team access controls
Type: advisorySources: OSV
Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2025-41410
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 13:12 UTC · Revision 1
Source evidence
Slack import bypasses email verification for team access controls
core-osv · Original sourcePublished 16 Oct 2025, 08:39 UTC
Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions
osv:CVE-2025-41410
Complete source record
{
"id": "3ede84e1e107e738fdc1215c452d14016758f8e394726d43da0a7e558b96651c",
"url": "https://osv.dev/vulnerability/CVE-2025-41410",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Slack import bypasses email verification for team access controls",
"summary": "Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions",
"evidence": "osv:CVE-2025-41410",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2025-41410",
"aliases": [
"CVE-2025-41410",
"GHSA-3q4q-wqm6-hvf3",
"GO-2025-4029"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mattermost/mattermost",
"type": "GIT",
"events": [
{
"introduced": "58bd34fd34cbd7d3da777d627b6cffdf8a532930"
},
{
"fixed": "bb822798f39a7f8c58b74c603f71ffb8a8f7a9be"
},
{
"introduced": "c8bd5c937551a4e9ad23f5a4fd8aaf7604d046dd"
},
{
"fixed": "0d6e8fa2e4681a172a136db18001104a57f9c28e"
},
{
"introduced": "5b955468ea1ea8b56c0fb10feb258a36a767d7bb"
},
{
"fixed": "f1f6719f38e167657caa46f45086ee3d3bf7e6d5"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "10.5.0"
},
{
"fixed": "10.5.11"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "10.10.0"
},
{
"fixed": "10.10.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "10.11.0"
},
{
"fixed": "10.11.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v10.10.3-rc1",
"v10.11.2-rc2",
"v10.11.2",
"v10.5.11-rc1",
"v10.11.2-rc1",
"v10.5.10",
"v10.10.2",
"v10.11.1",
"v10.5.10-rc2",
"v10.10.2-rc4",
"v10.11.1-rc1",
"v10.10.2-rc3",
"v10.11.0-rc3",
"v10.11.0",
"mattermost-redux@10.11.0",
"@mattermost/types@10.11.0",
"@mattermost/client@10.11.0",
"v10.5.10-rc1",
"v10.10.2-rc2",
"v10.10.2-rc1",
"v10.5.9",
"v10.5.9-rc4",
"v10.10.1",
"v10.5.9-rc3",
"v10.10.1-rc1",
"v10.5.9-rc2",
"v10.10.0",
"v10.5.9-rc1",
"v10.5.8",
"v10.5.8-rc1",
"v10.5.7",
"v10.5.6-rc1",
"v10.5.6",
"v10.5.5",
"v10.5.5-rc1",
"v10.5.4-rc2",
"v10.5.4",
"v10.5.4-rc1",
"v10.5.3",
"v10.5.3-rc1",
"v10.5.2",
"v10.5.1",
"v10.5.1-rc2",
"v10.5.1-rc1",
"v10.5.0-rc6",
"v10.5.0",
"@mattermost/types@10.5.0",
"@mattermost/client@10.5.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-41410.json"
}
}
],
"modified": "2026-10-28T02:30:35.342954361Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/41xxx/CVE-2025-41410.json",
"https://nvd.nist.gov/vuln/detail/CVE-2025-41410"
],
"provider_metadata": {
"cwe_ids": [
"CWE-862"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "10.10.0"
},
{
"last_affected": "10.10.2"
},
{
"introduced": "10.5.0"
},
{
"last_affected": "10.5.10"
},
{
"introduced": "10.11.0"
},
{
"last_affected": "10.11.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/41xxx/CVE-2025-41410.json"
}
},
"related_cves": [
{
"value": "CVE-2025-41410",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 502929,
"published_at": "2025-10-16T08:39:58.233+00:00"
}