Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.0/incl
- https://plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.0/incl
- https://plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.0/publ
- https://plugins.trac.wordpress.org/browser/prosolution-wp-client/tags/2.0.0/publ
- https://plugins.trac.wordpress.org/browser/prosolution-wp-client/trunk/includes/
- https://plugins.trac.wordpress.org/browser/prosolution-wp-client/trunk/includes/
- https://plugins.trac.wordpress.org/browser/prosolution-wp-client/trunk/public/cl
- https://plugins.trac.wordpress.org/browser/prosolution-wp-client/trunk/public/cl
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0b870d35-7e10-4fb5-8c3
FAQ
What is CVE-2026-6555?
CVE-2026-6555 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 ...
How severe is CVE-2026-6555?
CVE-2026-6555 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-6555?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.