{"id":"CVE-2026-19803","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-19803","summary":"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…","details":"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.","published":"2026-11-07T04:17:29.233","modified":"2026-11-07T04:17:29.377","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class-util.php#L165"},{"type":"WEB","url":"https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class-util.php#L586"},{"type":"WEB","url":"https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class.advanced.upload.php#L272"},{"type":"WEB","url":"https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class.advanced.upload.php#L284"},{"type":"WEB","url":"https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class.advanced.upload.php#L56"},{"type":"WEB","url":"https://plugins.trac.wordpress.org/changeset?reponame=&old=3747660%40printcart-integration&new=3747660%40printcart-integration"},{"type":"WEB","url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/2525ed97-b701-4f95-8d8c-202e816723c5?source=cve"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-11-07T04:17:29.377"}}