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CVE-2026-87855— JTL-Connector for WooCommerce <= 2.4.3 - Unauthenticated Arbitrary File Upload via 'image.push' Method

Quick assessment

Affected
ntbyk JTL-Connector for WooCommerce
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 WooCommerce JTL-Connector 插件在所有版本（包括 2.4.3 及之前版本）中存在任意文件上传漏洞，该漏洞源于 saveImage() 函数。其根本原因在于 startSession() 函数将空的 jtlauth 参数视为有效凭证，同时 handleImagePush() 函数对文件类型的验证不足。这使得未认证的攻击者能够上传可执行文件，从而导致远程代码执行。

CVSS 9.8 · Critical EPSS 0.79% · P55

Affected Version Matrix 1

VendorProduct Version RangeStatus
ntbyk JTL-Connector for WooCommerce ≤ 2.4.3 affected
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I. Basic Information for CVE-2026-87855

Vulnerability Information
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Vulnerability Title
JTL-Connector for WooCommerce <= 2.4.3 - Unauthenticated Arbitrary File Upload via 'image.push' Method
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ntbyk JTL-Connector for WooCommerce 0 ~ 2.4.3 -

II. Public POCs for CVE-2026-87855

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III. Intelligence Information for CVE-2026-87855

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Other References for CVE-2026-87855 (1)

IV. Related Vulnerabilities

Same product: JTL-Connector for WooCommerce
Same vendor: ntbyk
Same weakness: CWE-434

V. Comments for CVE-2026-87855

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