ubuntu-cve-2019-9787
Vulnerability from osv_ubuntu
Published
2019-03-14 16:29
Modified
2025-10-24 04:47
Summary
Details

WordPress before 5.1.1 does not properly filter comment content, leading to Remote Code Execution by unauthenticated users in a default configuration. This occurs because CSRF protection is mishandled, and because Search Engine Optimization of A elements is performed incorrectly, leading to XSS. The XSS results in administrative access, which allows arbitrary changes to .php files. This is related to wp-admin/includes/ajax-actions.php and wp-includes/comment.php.

Severity
8.8 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "wordpress",
            "binary_version": "4.4.2+dfsg-1ubuntu1"
          },
          {
            "binary_name": "wordpress-l10n",
            "binary_version": "4.4.2+dfsg-1ubuntu1"
          },
          {
            "binary_name": "wordpress-theme-twentyfifteen",
            "binary_version": "4.4.2+dfsg-1ubuntu1"
          },
          {
            "binary_name": "wordpress-theme-twentyfourteen",
            "binary_version": "4.4.2+dfsg-1ubuntu1"
          },
          {
            "binary_name": "wordpress-theme-twentysixteen",
            "binary_version": "4.4.2+dfsg-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "wordpress",
        "purl": "pkg:deb/ubuntu/wordpress@4.4.2+dfsg-1ubuntu1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3+dfsg-1",
        "4.3.1+dfsg-1",
        "4.4+dfsg-1",
        "4.4.1+dfsg-1",
        "4.4.2+dfsg-1",
        "4.4.2+dfsg-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "wordpress",
            "binary_version": "4.9.5+dfsg1-1"
          },
          {
            "binary_name": "wordpress-l10n",
            "binary_version": "4.9.5+dfsg1-1"
          },
          {
            "binary_name": "wordpress-theme-twentyfifteen",
            "binary_version": "4.9.5+dfsg1-1"
          },
          {
            "binary_name": "wordpress-theme-twentyseventeen",
            "binary_version": "4.9.5+dfsg1-1"
          },
          {
            "binary_name": "wordpress-theme-twentysixteen",
            "binary_version": "4.9.5+dfsg1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "wordpress",
        "purl": "pkg:deb/ubuntu/wordpress@4.9.5+dfsg1-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.8.2+dfsg-2",
        "4.8.3+dfsg-1",
        "4.9.1+dfsg-1",
        "4.9.2+dfsg-1",
        "4.9.4+dfsg-1",
        "4.9.5+dfsg1-1"
      ]
    }
  ],
  "aliases": [],
  "details": "WordPress before 5.1.1 does not properly filter comment content, leading to Remote Code Execution by unauthenticated users in a default configuration. This occurs because CSRF protection is mishandled, and because Search Engine Optimization of A elements is performed incorrectly, leading to XSS. The XSS results in administrative access, which allows arbitrary changes to .php files. This is related to wp-admin/includes/ajax-actions.php and wp-includes/comment.php.",
  "id": "UBUNTU-CVE-2019-9787",
  "modified": "2025-10-24T04:47:34Z",
  "published": "2019-03-14T16:29:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-9787"
    },
    {
      "type": "REPORT",
      "url": "https://blog.ripstech.com/2019/wordpress-csrf-to-rce/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/WordPress/WordPress/commit/0292de60ec78c5a44956765189403654fe4d080b"
    },
    {
      "type": "REPORT",
      "url": "https://wordpress.org/news/2019/03/wordpress-5-1-1-security-and-maintenance-release/"
    },
    {
      "type": "REPORT",
      "url": "https://wordpress.org/support/wordpress-version/version-5-1-1/"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2019-9787"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2019-9787"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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