CVE-2026-19803

Full vulnerability record from the local CVENow database.

Description

The Printcart Store – Web to Print Product Designer for WooCommerce plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.13.2. This is due to the `nbu_crop_image` AJAX handler accepting a user-supplied `url` parameter that `Nbdesigner_IO::convert_url_to_path()` concatenates onto the uploads base directory without normalizing or stripping `../` sequences, and then deriving both the output directory and output file extension via `pathinfo()` from the same attacker-controlled path — with no `stripImage()` call before `writeImage()` is invoked. This makes it possible for unauthenticated attackers to write attacker-controlled PHP content to arbitrary locations outside the uploads directory, resulting in remote code execution when the written file is subsequently requested. This vulnerability is only exploitable when the `nbdesigner_upload_popup_style` site option is set to `a` (Advanced Upload Popup), which causes the handler to be registered for unauthenticated requests; however, the required `save-design` nonce is printed on the fully public frontend `upload-design-file` page, making it trivially obtainable by any anonymous visitor once that configuration is active.

Severity

CRITICAL

CVSS score

9.8 (v3.1)

Vulnerability status

Deferred

Source identifier

[email protected]

Published

2026-11-07 04:17:29.233000

Last modified

2026-11-07 04:17:29.377000

View original CVE JSON

{
  "id": "CVE-2026-19803",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-07T04:17:29.233",
  "lastModified": "2026-11-07T04:17:29.377",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Printcart Store – Web to Print Product Designer for WooCommerce plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.13.2. This is due to the `nbu_crop_image` AJAX handler accepting a user-supplied `url` parameter that `Nbdesigner_IO::convert_url_to_path()` concatenates onto the uploads base directory without normalizing or stripping `../` sequences, and then deriving both the output directory and output file extension via `pathinfo()` from the same attacker-controlled path — with no `stripImage()` call before `writeImage()` is invoked. This makes it possible for unauthenticated attackers to write attacker-controlled PHP content to arbitrary locations outside the uploads directory, resulting in remote code execution when the written file is subsequently requested. This vulnerability is only exploitable when the `nbdesigner_upload_popup_style` site option is set to `a` (Advanced Upload Popup), which causes the handler to be registered for unauthenticated requests; however, the required `save-design` nonce is printed on the fully public frontend `upload-design-file` page, making it trivially obtainable by any anonymous visitor once that configuration is active."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "printcart",
          "product": "Printcart Store – Web to Print Product Designer for WooCommerce",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThanOrEqual": "2.13.2",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class-util.php#L165",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class-util.php#L586",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class.advanced.upload.php#L272",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class.advanced.upload.php#L284",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class.advanced.upload.php#L56",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=&old=3747660%40printcart-integration&new=3747660%40printcart-integration",
      "source": "[email protected]"
    },
    {
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/2525ed97-b701-4f95-8d8c-202e816723c5?source=cve",
      "source": "[email protected]"
    }
  ]
}