ProSolution WP Client

9.8 / 10

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

AI Analysis

Arbitrary File Upload vulnerability in ProSolution WP Client plugin for WordPress, allowing unauthenticated attackers to upload malicious PHP files and achieve remote code execution.

Basic Information

ID CVE-2026-6555

Source Wordfence

Published May 20, 2026 at 01:25

Affected Product

Vendor prosolution

Product ProSolution WP Client

Affected Versions prosolution ProSolution WP Client 0

CWE Classification

CWE-434

AI Assessment

AI Score 9.8 / 10

AI Severity Critical

Vendor ProSolution

Product ProSolution WP Client

Version 2.0.0

References

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    "published": "2026-05-20T01:25:45.499Z",
    "modified": "2026-05-20T01:25:45.499Z",
    "type": "cve",
    "title": "ProSolution WP Client <= 2.0.0 - Unauthenticated Arbitrary File Upload via 'files'",
    "source": "Wordfence",
    "references": "https://www.wordfence.com/threat-intel/vulnerabilities/id/0b870d35-7e10-4fb5-8c3b-2bf299d1f3d5?source=cve\nhttps://plugins.trac.wordpress.org/browser/prosolution-wp-client/trunk/public/class-prosolwpclient-public.php#L1072\nhttps://plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.0/public/class-prosolwpclient-public.php#L1072\nhttps://plugins.trac.wordpress.org/browser/prosolution-wp-client/trunk/includes/UploadHandler.php#L1345\nhttps://plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.0/includes/UploadHandler.php#L1345\nhttps://plugins.trac.wordpress.org/browser/prosolution-wp-client/trunk/includes/UploadHandler.php#L384\nhttps://plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.0/includes/UploadHandler.php#L384\nhttps://plugins.trac.wordpress.org/browser/prosolution-wp-client/trunk/public/class-prosolwpclient-public.php#L998\nhttps://plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.0/public/class-prosolwpclient-public.php#L998",
    "id": "CVE-2026-6555",
    "bulletinFamily": "",
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    "cvelist": null,
    "sourceData": "prosolution ProSolution WP Client 0",
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        "version": "3.1"
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    "product": "ProSolution WP Client",
    "version": "0",
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    "ai_description": "Arbitrary File Upload vulnerability in ProSolution WP Client plugin for WordPress, allowing unauthenticated attackers to upload malicious PHP files and achieve remote code execution.",
    "ai_severity": "Critical",
    "ai_vendor": "ProSolution",
    "ai_product": "ProSolution WP Client",
    "ai_version": "2.0.0",
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ProSolution WP Client <= 2.0.0 - Unauthenticated Arbitrary File Upload via 'files'_CVE-2026-6555