Blocksy Companion <=2.1.45 Stored XSS via admin settings (multisite)
CVE-2026-12430 Published on June 19, 2026
Blocksy Companion <= 2.1.45 - Authenticated (Editor+) Stored Cross-Site Scripting via 'product_description' Parameter
The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 2.1.45 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Timeline
Vendor Notified
Disclosed 2 days later.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-12430 has been classified to as a XSS vulnerability or weakness.
Affected Versions
creativethemeshq Blocksy Companion:- Before and including 2.1.45 is affected.