CVE-2026-87855
Deferred Deferred - Pending Action

Arbitrary File Upload in JTL-Connector for WooCommerce Plugin

Publication date: 2026-10-14

Last updated on: 2026-10-14

Assigner: Wordfence

Description
The JTL-Connector for WooCommerce plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.4.3 via the saveImage() function. This is due to the startSession() function accepting an empty jtlauth parameter as a valid credential, combined with insufficient file type validation in handleImagePush(). This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible.

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Meta Information

Published
2026-10-14
Last Modified
2026-10-14
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-87855
EUVD
EUVD-2026-100800

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
ntbyk JTL-Connector for WooCommerce 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

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Executive Summary

The JTL-Connector for WooCommerce plugin for WordPress has an arbitrary file upload vulnerability in versions up to 2.4.3. The saveImage() function allows unauthenticated attackers to upload executable files due to weak authentication in startSession() and insufficient file type checks in handleImagePush(). This can lead to remote code execution.

Detection Guidance

Check for unauthorized file uploads in WordPress directories, especially in the JTL-Connector plugin folder. Look for unexpected PHP or executable files. Review server logs for POST requests to /wp-content/plugins/jtl-connector-woocommerce/handleImagePush.php with suspicious parameters.

Impact Analysis

An attacker could exploit this to upload malicious files to your WordPress site, potentially gaining control over it. This could lead to data theft, website defacement, or further attacks on your server or users.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating GDPR and HIPAA requirements for data protection and security. Non-compliance may result in legal penalties and reputational damage.

Mitigation Strategies

Immediately update the JTL-Connector for WooCommerce plugin to the latest version beyond 2.4.3. If an update is unavailable, disable or remove the plugin. Restrict file upload permissions and monitor for signs of exploitation like unexpected files or processes.

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