Blocksy Companion vulnerabilities

Unauthenticated Broken Access Control vulnerability in Blocksy Companion versions up to 2.1.55.

The Blocksy Companion plugin for WordPress is vulnerable to arbitrary file upload in versions up to 2.1.46. The flaw lies in the save_attachments function, which improperly validates file extensions, allowing double-extension files like shell.woff2.php to bypass MIME checks. This can lead to remote code execution, but exploitation requires the premium plugin with specific extensions active.

The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tagName' block attribute in all versions up to and including 2.1.51. Authenticated attackers with author-level access or higher can inject arbitrary web scripts that execute whenever a user accesses an injected page.