# CVE-2026-111255: affiliate-toolkit arbitrary file upload in product image handler

Source: https://junglewise.ai/threats/cve-2026-111255-the-affiliate-toolkit-multi-network-affiliate-amazon-product  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-28. Updated: 2026-10-28  
License: CC BY 4.0 with a link back

CVE-2026-111255 · Severity: high · CVSS 7.5 · Published 2026-10-28

The affiliate-toolkit WordPress plugin, which displays affiliate products and Amazon listings, allows authenticated users with contributor access to upload executable files by exploiting weak file type validation in the image import feature. Successful exploitation enables remote code execution on the website, giving attackers full control over the server and any data it holds.

Technologies: [Affiliate-Toolkit Affiliate Toolkit – Multi-Network Affiliate & Amazon Product Display](https://junglewise.ai/threats/technologies/affiliate-toolkit-multi-network-affiliate-amazon-product-display). Vendors: [Affiliate-Toolkit](https://junglewise.ai/threats/vendors/affiliate-toolkit).

## Quick answers

**Is CVE-2026-111255 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-111255 being exploited in the wild.

**How severe is CVE-2026-111255?** High severity, with a CVSS score of 7.5, published 28 October 2026.

**Which products and versions are affected?** Affiliate-Toolkit Affiliate Toolkit – Multi-Network Affiliate & Amazon Product Display up to and including 3.9.2.

**Is there a fix for CVE-2026-111255?** No fixed version is recorded yet. Disable the "import product image" option in the plugin settings to prevent the image download pipeline from being triggered, which closes the exploitation vector until a patched version is available.</anigation>
</invoke> If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-111255 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-111255?** Check whether you run Affiliate-Toolkit Affiliate Toolkit – Multi-Network Affiliate & Amazon Product Display at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix


Disable the "import product image" option in the plugin settings to prevent the image download pipeline from being triggered, which closes the exploitation vector until a patched version is available.</anigation>
</invoke>

## Technical details

The upload_image function in the affiliate-toolkit plugin uses insufficient file type validation that relies on weak Content-Type prefix checks and derives file extensions from attacker-controlled URL paths without stripping dangerous extensions. An authenticated contributor can exploit this during the product import process—specifically when the "import product image" option is enabled—to upload executable files such as PHP shells, achieving remote code execution.

## Affected products

- affiliate-toolkit affiliate-toolkit – Multi-Network Affiliate & Amazon Product Display up to and including 3.9.2

## Timeline

- 2026-10-28: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/affiliate-toolkit-starter/tags/3.9.2/includes/atkp_posttypes_product.php](https://plugins.trac.wordpress.org/browser/affiliate-toolkit-starter/tags/3.9.2/includes/atkp_posttypes_product.php)
- [https://plugins.trac.wordpress.org/browser/affiliate-toolkit-starter/tags/3.9.2/includes/basics/ATKPTools.php](https://plugins.trac.wordpress.org/browser/affiliate-toolkit-starter/tags/3.9.2/includes/basics/ATKPTools.php)

## Related threats

- [Affiliate Toolkit stored cross-site scripting via product URL parameter](https://junglewise.ai/threats/cve-2026-111314-the-affiliate-toolkit-multi-network-affiliate-amazon-product)
- [Affiliate Toolkit time-based SQL injection in orderby parameter](https://junglewise.ai/threats/cve-2026-12743-affiliate-toolkit-time-based-sql-injection-in-orderby-parameter)