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CVE-2026-6555— ProSolution WP Client <= 2.0.0 - Unauthenticated Arbitrary File Upload via 'files'

Quick assessment

Affected
prosolution ProSolution WP Client
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和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin ProSolution WP Client 2.0.0及之前版本存在代码问题漏洞，该漏洞源于数组验证不匹配，可能导致未经身份验证的攻击者上传恶意PHP文件并实现远程代码执行。

CVSS 9.8 · Critical EPSS 1.35% · P70

Possible ATT&CK Techniques 1 AI

T1505.003 · Web Shell

Affected Version Matrix 1

VendorProduct Version RangeStatus
prosolution ProSolution WP Client ≤ 2.0.0 affected
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I. Basic Information for CVE-2026-6555

Vulnerability Information
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Vulnerability Title
ProSolution WP Client <= 2.0.0 - Unauthenticated Arbitrary File Upload via 'files'
Source: CVE Program / CVE List V5
Vulnerability Description
The ProSolution WP Client plugin for WordPress is vulnerable to Arbitrary File Upload in versions up to, and including, 2.0.0. This is due to an array validation mismatch where only the first file in the upload array undergoes extension and MIME type validation, while all files are processed and uploaded to a web-accessible directory. This makes it possible for unauthenticated attackers to upload malicious PHP files and achieve remote code execution by sending a valid first file followed by a malicious file.
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
Vulnerability Title
WordPress plugin ProSolution WP Client 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin ProSolution WP Client 2.0.0及之前版本存在代码问题漏洞，该漏洞源于数组验证不匹配，可能导致未经身份验证的攻击者上传恶意PHP文件并实现远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
prosolution ProSolution WP Client 0 ~ 2.0.0 -

II. Public POCs for CVE-2026-6555

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III. Intelligence Information for CVE-2026-6555

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Patches & Fixes for CVE-2026-6555 (1)

Vendor Advisories for CVE-2026-6555 (1)

IV. Related Vulnerabilities

Same product: ProSolution WP Client
Same vendor: prosolution
Same weakness: CWE-434

V. Comments for CVE-2026-6555

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