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CVE-2026-16098— ProSolution WP Client <= 2.0.10 - Unauthenticated Arbitrary File Upload via Content-Disposition Header Filename Override

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 ProSolution WP Client是WordPress基金会的一款网站内容管理系统的客户端组件。 ProSolution WP Client 2.0.10及之前版本存在任意文件上传漏洞，该漏洞源于proSol_handleFileUpload函数未对攻击者控制的Content-Disposition头文件名进行充分验证，且保存后扩展名检查无法删除已写入文件，可能导致未经身份验证的攻击者上传可执行文件并实现远程代码执行。

CVSS 9.8 · Critical EPSS 1.20% · P67

Affected Version Matrix 1

VendorProduct Version RangeStatus
prosolution ProSolution WP Client ≤ 2.0.10 affected
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I. Basic Information for CVE-2026-16098

Vulnerability Information
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Vulnerability Title
ProSolution WP Client <= 2.0.10 - Unauthenticated Arbitrary File Upload via Content-Disposition Header Filename Override
Source: CVE Program / CVE List V5
Vulnerability Description
The ProSolution WP Client plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.0.10 via the proSol_handleFileUpload function. This is due to missing validation of the attacker-controlled Content-Disposition header filename, which overrides the allow-listed multipart filename before the file is saved, and a post-save extension check that fails to delete the already-written file. This makes it possible for unauthenticated attackers to upload files that may be executable, which makes remote code execution possible. The nonce required to reach the upload handler is publicly exposed via wp_localize_script on any front-end page rendering the job portal shortcode, allowing unauthenticated visitors to obtain a valid nonce and bypass that gating check entirely.
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
ProSolution WP Client 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress ProSolution WP Client是WordPress基金会的一款网站内容管理系统的客户端组件。 ProSolution WP Client 2.0.10及之前版本存在任意文件上传漏洞，该漏洞源于proSol_handleFileUpload函数未对攻击者控制的Content-Disposition头文件名进行充分验证，且保存后扩展名检查无法删除已写入文件，可能导致未经身份验证的攻击者上传可执行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 ~ 2.0.10 -

II. Public POCs for CVE-2026-16098

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III. Intelligence Information for CVE-2026-16098

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Patches & Fixes for CVE-2026-16098 (1)

Security Blog Posts for CVE-2026-16098 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-16098

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