Medium
Munged email address used for password resets and notifications
Type: advisorySources: OSV
Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to ensure that remote/synthetic users cannot create sessions or reset passwords, which allows the munged email addresses, created by shared channels, to be used to receive email notifications and to reset passwords, when they are valid, functional emails.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2024-39836
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 03:54 UTC · Revision 1
Source evidence
Munged email address used for password resets and notifications
core-osv · Original sourcePublished 22 Aug 2024, 06:27 UTC
Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to ensure that remote/synthetic users cannot create sessions or reset passwords, which allows the munged email addresses, created by shared channels, to be used to receive email notifications and to reset passwords, when they are valid, functional emails.
osv:CVE-2024-39836
Complete source record
{
"id": "5df3c8556def428a7d96494d3b60b9a4377b293711429050c6036810debcb339",
"url": "https://osv.dev/vulnerability/CVE-2024-39836",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Munged email address used for password resets and notifications",
"summary": "Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to ensure that remote/synthetic users cannot create sessions or reset passwords, which allows the munged email addresses, created by shared channels, to be used to receive email notifications and to reset passwords, when they are valid, functional emails.",
"evidence": "osv:CVE-2024-39836",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2024-39836",
"aliases": [
"CVE-2024-39836",
"GHSA-c6vp-jjgv-38wj",
"GO-2024-3096"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mattermost/mattermost",
"type": "GIT",
"events": [
{
"introduced": "99d819d25d0b16b3faed901b1fe5c41de7655e9c"
},
{
"fixed": "43355fe32a953e8b7aa82a9c4cd024311665c098"
},
{
"introduced": "015002180e109f0384c511a01dede846c549ce35"
},
{
"fixed": "cd60532e9a41cbc2150e7747308f9bb08aa61f15"
},
{
"introduced": "4179e17b491ec5292ca6e157d7b216b464bce397"
},
{
"fixed": "7bbf7ec130487af9a324040259b2e942d7b9ba3c"
},
{
"introduced": "60c5bb46dfa8192efa5a13c746423f0e7696b8bc"
},
{
"fixed": "23993132c67b11e5d8a0d0d789b7079868200b63"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.5.0"
},
{
"fixed": "9.5.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.8.0"
},
{
"fixed": "9.8.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.9.0"
},
{
"fixed": "9.9.2"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "9.10.0"
},
{
"fixed": "9.10.1"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v9.10.1-rc2",
"v9.5.8-rc1",
"v9.8.3-rc1",
"v9.9.2-rc1",
"v9.10.1-rc1",
"v9.5.7-rc3",
"v9.5.7",
"v9.8.2-rc4",
"v9.8.2",
"v9.10.0-rc3",
"v9.10.0",
"@mattermost/types@9.10.0",
"@mattermost/client@9.10.0",
"v9.9.1-rc4",
"v9.9.1",
"v9.8.2-rc3",
"v9.9.1-rc3",
"v9.8.2-rc2",
"v9.5.7-rc2",
"v9.9.1-rc2",
"v9.8.2-rc1",
"v9.9.1-rc1",
"v9.5.7-rc1",
"v9.5.6",
"v9.9.0-rc4",
"v9.9.0",
"@mattermost/types@9.9.0",
"@mattermost/client@9.9.0",
"v9.5.6-rc2",
"v9.8.1-rc2",
"v9.8.1",
"v9.8.1-rc1",
"v9.5.6-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",
"v9.5.4-rc2",
"v9.5.4",
"v9.5.4-rc1",
"v9.5.3",
"v9.5.3-rc3",
"v9.5.3-rc2",
"v9.5.3-rc1",
"v9.5.2",
"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-2024-39836.json"
}
}
],
"modified": "2026-10-28T02:30:42.085184973Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39836.json",
"https://nvd.nist.gov/vuln/detail/CVE-2024-39836"
],
"provider_metadata": {
"cwe_ids": [
"CWE-693"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "9.10.0"
},
{
"last_affected": "9.10.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandaloneSingleVersion"
}
]
},
{
"extracted_events": [
{
"range": [
{
"introduced": "9.9.0"
},
{
"last_affected": "9.9.1"
},
{
"introduced": "9.5.0"
},
{
"last_affected": "9.5.7"
},
{
"introduced": "9.8.0"
},
{
"last_affected": "9.8.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39836.json"
}
},
"related_cves": [
{
"value": "CVE-2024-39836",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 510042,
"published_at": "2024-08-22T06:27:09.829+00:00"
}