High
Security advisory
Contao is an open source CMS that allows you to create websites and scalable web applications. In affected versions it is possible to load PHP files by entering insert tags in the Contao back end. Installations are only affected if they have untrusted back end users who have the rights to modify fields that are shown in the front end. Update to Contao 4.4.56, 4.9.18 or 4.11.7 to resolve. If you cannot update then disable the login for untrusted back end users.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-37626
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:50 UTC · Revision 1
Source evidence
Contao is an open source CMS that allows you to create websites and scalable web applications. In affected versions it is possible to load PHP files by entering insert tags in the Contao back end. Installations are only affected if they have untrusted back end users who have the rights to modify fields that are shown in the front end. Update to Contao 4.4.56, 4.9.18 or 4.11.7 to resolve. If you cannot update then disable the login for untrusted back end users.
osv:CVE-2021-37626
Complete source record
{
"id": "8f5ade15760f41e403d1a8f21ec168253e66deff722446b9ccbe4e3d52e4024b",
"url": "https://osv.dev/vulnerability/CVE-2021-37626",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-37626",
"summary": "Contao is an open source CMS that allows you to create websites and scalable web applications. In affected versions it is possible to load PHP files by entering insert tags in the Contao back end. Installations are only affected if they have untrusted back end users who have the rights to modify fields that are shown in the front end. Update to Contao 4.4.56, 4.9.18 or 4.11.7 to resolve. If you cannot update then disable the login for untrusted back end users.",
"evidence": "osv:CVE-2021-37626",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2021-37626",
"aliases": [
"CVE-2021-37626",
"GHSA-r6mv-ppjc-4hgr"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/contao/contao",
"type": "GIT",
"events": [
{
"introduced": "da8a867d8335c4ca55e5085dac11f1fecd12650e"
},
{
"fixed": "d4b1299fa180b522613a78cd9b192c3ccdb28448"
},
{
"introduced": "23899ad910aa057494cce4517015aa31faa37f11"
},
{
"fixed": "1a1e7bb2050f08b2814de68efae4f11c3256c853"
},
{
"introduced": "9fc3041d7833e35c8a3812ca0954a857b24441fd"
},
{
"fixed": "7715fdfd3d1dda3ec1e3d9a02a2bd535983ac7fc"
},
{
"introduced": "84b2fe637d5ead531f117f26b48d1b9de8df4074"
},
{
"last_affected": "5a25b1d689ffde95a00427bdfde03695a2c645c3"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.56"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.9.0"
},
{
"fixed": "4.9.18"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.11.0"
},
{
"fixed": "4.11.7"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:contao:contao:4.0.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.0"
},
{
"last_affected": "4.0.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:contao:contao:4.1.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.1.0"
},
{
"last_affected": "4.1.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:contao:contao:4.2.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.2.0"
},
{
"last_affected": "4.2.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:contao:contao:4.3.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.3.0"
},
{
"last_affected": "4.3.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:contao:contao:4.5.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.5.0"
},
{
"last_affected": "4.5.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:contao:contao:4.6.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.6.0"
},
{
"last_affected": "4.6.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:contao:contao:4.7.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.7.0"
},
{
"last_affected": "4.7.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:contao:contao:4.8.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.8.0"
},
{
"last_affected": "4.8.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:contao:contao:4.10.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.10.0"
},
{
"last_affected": "4.10.0"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"4.0.0",
"4.1.0",
"4.10.0",
"4.2.0",
"4.3.0",
"4.5.0",
"4.6.0",
"4.7.0",
"4.8.0",
"4.11.6",
"4.9.17",
"4.11.4",
"4.9.15",
"4.9.14",
"4.11.3",
"4.9.13",
"4.11.2",
"4.11.1",
"4.9.12",
"4.11.0",
"4.9.11",
"4.9.10",
"4.9.9",
"4.9.8",
"4.9.7",
"4.9.6",
"4.9.5",
"4.9.4",
"4.9.3",
"4.9.2",
"4.9.1",
"4.9.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-37626.json"
}
}
],
"modified": "2026-10-20T10:54:49.577613547Z",
"provider": "osv",
"references": [
"https://contao.org/en/security-advisories/php-file-inclusion-via-insert-tags.html",
"https://github.com/contao/contao/security/advisories/GHSA-r6mv-ppjc-4hgr"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-37626",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 386222,
"published_at": "2021-08-11T23:15:07.75+00:00"
}