Security advisory
WordPress version <4.9 contains a CWE-20 Input Validation vulnerability in thumbnail processing that can result in remote code execution. This attack appears to be exploitable via thumbnail upload by an authenticated user and may require additional plugins in order to be exploited however this has not been confirmed at this time. This issue appears to have been partially, but not completely fixed in WordPress 4.9
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2017-1000600
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:21 UTC · Revision 1
Source evidence
WordPress version <4.9 contains a CWE-20 Input Validation vulnerability in thumbnail processing that can result in remote code execution. This attack appears to be exploitable via thumbnail upload by an authenticated user and may require additional plugins in order to be exploited however this has not been confirmed at this time. This issue appears to have been partially, but not completely fixed in WordPress 4.9
osv:CVE-2017-1000600
Complete source record
{
"id": "f36f02e7e51ed5362200cf25669dd1f0d16492a4c88e9b85d7a3bf5e747b485f",
"url": "https://osv.dev/vulnerability/CVE-2017-1000600",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2017-1000600",
"summary": "WordPress version <4.9 contains a CWE-20 Input Validation vulnerability in thumbnail processing that can result in remote code execution. This attack appears to be exploitable via thumbnail upload by an authenticated user and may require additional plugins in order to be exploited however this has not been confirmed at this time. This issue appears to have been partially, but not completely fixed in WordPress 4.9",
"evidence": "osv:CVE-2017-1000600",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2017-1000600",
"aliases": [
"CVE-2017-1000600"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/wordpress/wordpress",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "29ffbff370968ae48a1b7a34e35c8b8e75cf0f91"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.9"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-1000600.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/wordpress/wordpress-develop",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "31f7ece8503f0dc6ef1df2473ae3f3d352973e12"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.9"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-1000600.json"
}
}
],
"modified": "2026-10-24T10:30:52.151955979Z",
"provider": "osv",
"references": [
"https://www.theregister.co.uk/2018/08/20/php_unserialisation_wordpress_vuln/",
"https://youtu.be/GePBmsNJw6Y?t=1763"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2017-1000600",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 437636,
"published_at": "2018-09-06T12:29:00.233+00:00"
}