ProSolution WP Client Plugin up to 2.0.0 on WordPress unrestricted upload

Summaryinfo

A vulnerability classified as critical has been found in ProSolution WP Client Plugin up to 2.0.0 on WordPress. This issue affects some unknown processing. Performing a manipulation results in unrestricted upload. This vulnerability is reported as CVE-2026-6555. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in ProSolution WP Client Plugin up to 2.0.0 on WordPress. This affects some unknown processing. The manipulation with an unknown input leads to a unrestricted upload vulnerability. CWE is classifying the issue as CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed by Achmad Zaenuri Dahlan Putra. The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-6555 since 04/18/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

Upgrading to version 2.0.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-31016). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• ProSolution

Name

• WP Client Plugin

Version

• 2.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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