CVE-2026-58480: Blocksy Companion Pro < 2.1.47 allows attackers to upload malicious files

Summary

The Blocksy Companion Pro plugin for WordPress is affected if it's version is less than 2.1.47. Attackers can upload malicious files, such as executable code, which can lead to unauthorized access and control of the website. To fix this, update the plugin to version 2.1.47 or later.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions
creative themes	blocksy companion	<= 2.1.46

Original title

Blocksy Companion Pro plugin for WordPress before 2.1.47 contains an unauthenticated arbitrary file upload vulnerability that allows attackers to upload executable files by bypassing extension vali...

Original description

Blocksy Companion Pro plugin for WordPress before 2.1.47 contains an unauthenticated arbitrary file upload vulnerability that allows attackers to upload executable files by bypassing extension validation in the save_attachments function exposed through the Advanced Reviews feature. Attackers can exploit the Custom Fonts extension's flawed strpos() substring check by uploading double-extension filenames such as shell.woff2.php, causing the validation to pass on the substring match while the web server executes the file as PHP, achieving remote code execution.

mitre CVSS3.1 9.8

Vulnerability type

CWE-434 Unrestricted File Upload

https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/blocksy... third-party-advisory
https://patchstack.com/database/wordpress/plugin/blocksy-companion/vulnerability... third-party-advisory
https://wordpress.org/plugins/blocksy-companion/ product patch
https://www.vulncheck.com/advisories/blocksy-companion-pro-unauthenticated-file-... third-party-advisory