ProSolution WP Client <= 2.0.0 - Unauthenticated Arbitrary File Upload via 'files'

Summary

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.

Timeline

1. May 20, 2026, 1:25 AM UTCCVE published
2. May 20, 2026, 1:15 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: total

3. Jun 23, 2026, 12:48 AM UTCRecord last updated

Affected versions

• prosolution ProSolution WP Client

  through 2.0.0

References 10