CVE-2025-9565: Blocksy Companion <= 2.1.10 - Authenticated (Contributor+) Stored Cross-Site Scripting via blocksy_newsletter_subscribe Shortcode
The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's blocksynewslettersubscribe shortcode in all versions up to, and including, 2.1.10 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-9565?
CVE-2025-9565 is classified as a medium severity vulnerability due to the potential for Stored Cross-Site Scripting attacks.
How do I fix CVE-2025-9565?
To mitigate CVE-2025-9565, update the Blocksy Companion plugin to version 2.1.11 or later.
What versions of Blocksy Companion are affected by CVE-2025-9565?
CVE-2025-9565 affects all versions of Blocksy Companion up to and including 2.1.10.
What type of vulnerability is CVE-2025-9565?
CVE-2025-9565 is a Stored Cross-Site Scripting vulnerability due to improper handling of user input in the newsletter subscription feature.
What are the consequences of exploiting CVE-2025-9565?
Exploiting CVE-2025-9565 can allow attackers to execute arbitrary JavaScript in the context of user sessions, potentially leading to unauthorized data access or manipulation.