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vuln-ubuntu/data/osv/cve/2021/UBUNTU-CVE-2021-3603.json
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{
"schema_version": "1.7.0",
"id": "UBUNTU-CVE-2021-3603",
"details": "PHPMailer 6.4.1 and earlier contain a vulnerability that can result in untrusted code being called (if such code is injected into the host project's scope by other means). If the $patternselect parameter to validateAddress() is set to 'php' (the default, defined by PHPMailer::$validator), and the global namespace contains a function called php, it will be called in preference to the built-in validator of the same name. Mitigated in PHPMailer 6.5.0 by denying the use of simple strings as validator function names.",
"aliases": [],
"upstream": [
"CVE-2021-3603"
],
"related": [
"USN-5956-1"
],
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"published": "2021-06-17T12:15:00Z",
"modified": "2025-10-24T04:49:53Z",
"affected": [
{
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "libphp-phpmailer",
"purl": "pkg:deb/ubuntu/libphp-phpmailer@6.0.6-0.1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.6-0.1ubuntu0.1~esm1"
}
]
}
],
"versions": [
"6.0.6-0.1"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libphp-phpmailer",
"binary_version": "6.0.6-0.1ubuntu0.1~esm1"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
},
{
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "libphp-phpmailer",
"purl": "pkg:deb/ubuntu/libphp-phpmailer@6.2.0-2ubuntu0.1~esm1?arch=source&distro=esm-apps/jammy"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.2.0-2ubuntu0.1~esm1"
}
]
}
],
"versions": [
"6.2.0-2"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libphp-phpmailer",
"binary_version": "6.2.0-2ubuntu0.1~esm1"
}
],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
}
],
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-3603"
},
{
"type": "REPORT",
"url": "https://www.huntr.dev/bounties/1-PHPMailer/PHPMailer/"
},
{
"type": "REPORT",
"url": "https://github.com/PHPMailer/PHPMailer/commit/45f3c18dc6a2de1cb1bf49b9b249a9ee36a5f7f3"
},
{
"type": "REPORT",
"url": "https://github.com/PHPMailer/PHPMailer/commit/45f3c18dc6a2de1cb1bf49b9b249a9ee36a5f7f3"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5956-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-3603"
}
]
}