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High

Security advisory

Type: advisorySources: OSVCVE: CVE-2017-1000600

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

CVE-2017-1000600

core-osv · Original source

Published 6 Sept 2018, 12:29 UTC

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"
}