ProSolution WP Client: Dangerous file upload

ProSolution WP Client is affected by dangerous file upload. The vulnerable path is reachable without authentication. Successful exploitation can place attacker-controlled executable content on the server and may lead to full site compromise. The published affected range is <= 2.0.0.

CVE / CNA score 9.8 CVSS 3.1 · security@wordfence.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: ProSolution WP Client
Plugin slug: prosolution-wp-client
Affected: <= 2.0.0
Safe version: See mitigation notes
Published: May 20, 2026
Weakness: CWE-434 — Unrestricted Upload of File with Dangerous Type

This CVE was published May 20, 2026 and is one of 10 known issues for this plugin.

What to do

Update, patch or deactivate.

No fixed release is identified. Update ProSolution WP Client when a release after 2.0.0 becomes available; until then, disable and remove it when the site's risk warrants. The official upstream changelog lists version 2.0.11, which is newer than the published affected range. Its changelog does not clearly confirm this specific fix, so it is not counted as a known-safe release.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical 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.

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

References

Primary and upstream sources

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