Medium
Malicious imports can lead to Denial of Service
Type: advisorySources: OSV
The legacy Slack import feature in Mattermost version 6.7.0 and earlier fails to properly limit the sizes of imported files, which allows an authenticated attacker to crash the server by importing large files via the Slack import REST API.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2022-2406
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 00:43 UTC · Revision 1
Source evidence
Malicious imports can lead to Denial of Service
core-osv · Original sourcePublished 14 Jul 2022, 17:23 UTC
The legacy Slack import feature in Mattermost version 6.7.0 and earlier fails to properly limit the sizes of imported files, which allows an authenticated attacker to crash the server by importing large files via the Slack import REST API.
osv:CVE-2022-2406
Complete source record
{
"id": "410db5715981caf532ee727796bfe8faf9f80dc66afc701c9446232b5657a65e",
"url": "https://osv.dev/vulnerability/CVE-2022-2406",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Malicious imports can lead to Denial of Service",
"summary": "The legacy Slack import feature in Mattermost version 6.7.0 and earlier fails to properly limit the sizes of imported files, which allows an authenticated attacker to crash the server by importing large files via the Slack import REST API.",
"evidence": "osv:CVE-2022-2406",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2022-2406",
"aliases": [
"CVE-2022-2406"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mattermost/mattermost",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "a030ae538b9cd373b4e0aa808fc426b82ed24937"
},
{
"introduced": "86a797bc64e7448dbfaa670ed6b8fd7b437e97c3"
},
{
"last_affected": "c4ab2024ae2ceb9d122484d23eab926289d553c6"
},
{
"introduced": "e05e0f9379e1324618601e3ba6111d78710e6319"
},
{
"last_affected": "714d065986fa9f6163b417d9760bf707cc237c71"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "6.3.8"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "6.4.0"
},
{
"last_affected": "6.5.1"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost:6.6.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "6.6.0"
},
{
"last_affected": "6.6.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost:6.6.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "6.6.1"
},
{
"last_affected": "6.6.1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:mattermost:mattermost:6.7.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "6.7.0"
},
{
"last_affected": "6.7.0"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"6.6.0",
"6.6.1",
"6.7.0",
"v6.7.0",
"cloud-2022-04-28-1",
"v6.3.8",
"v6.5.1",
"v6.3.7",
"v6.3.6",
"v6.5.0",
"v6.3.5",
"cloud-2022-03-02-1",
"v6.3.4",
"v6.3.3",
"v6.3.2",
"v6.3.1",
"v6.3.0",
"cloud-2021-12-08-1",
"cloud-2021-11-30-1",
"cloud-2021-11-23-1",
"cloud-2021-11-25-1",
"cloud-2021-11-11-1",
"cloud-2021-11-09-1",
"cloud-2021-10-27-1",
"cloud-2021-10-12-1",
"cloud-2021-09-29-1",
"cloud-2021-08-12-1",
"cloud-2021-07-29-1",
"cloud-2021-07-15-1",
"cloud-2021-07-01-1",
"cloud-2021-06-16-1",
"cloud-2021-06-02-1",
"cloud-2021-05-21-1",
"cloud-2021-05-05-1",
"cloud-2021-04-22-1",
"cloud-2021-03-23-1",
"cloud-2021-03-12-1",
"cloud-2021-02-25-1",
"cloud-2021-02-24",
"cloud-2021-02-10",
"cloud-2021-01-26",
"cloud-2021-01-12",
"cloud-2020-12-18",
"cloud-2020-12-08",
"cloud-2020-11-24",
"v5.2.0-rc2",
"v5.2.0-rc1",
"v5.1.0-rc1",
"v5.0.0-rc1",
"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-2022-2406.json"
}
}
],
"modified": "2026-10-28T02:30:48.376444371Z",
"provider": "osv",
"references": [
"https://mattermost.com/security-updates/",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/2xxx/CVE-2022-2406.json",
"https://nvd.nist.gov/vuln/detail/CVE-2022-2406"
],
"provider_metadata": {
"cwe_ids": [
"CWE-400"
],
"cna_assigner": "Mattermost",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"last_affected": "6.3.8"
}
],
"source": "AFFECTED_FIELD",
"strategy": "SplitRange"
}
]
},
{
"extracted_events": [
{
"range": [
{
"introduced": "6.4.x"
},
{
"last_affected": "6.4.x"
},
{
"introduced": "6.7.x 6.7.0"
},
{
"last_affected": "6.7.x 6.7.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandaloneSingleVersion"
}
]
},
{
"extracted_events": [
{
"range": [
{
"introduced": "6.5.x"
},
{
"last_affected": "6.5.1"
},
{
"introduced": "6.6.x"
},
{
"last_affected": "6.6.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/2xxx/CVE-2022-2406.json"
}
},
"related_cves": [
{
"value": "CVE-2022-2406",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 516710,
"published_at": "2022-07-14T17:23:55+00:00"
}