CVE-2025-12475: Blocksy Companion <= 2.1.14 - Authenticated (Contributor+) Stored Cross-Site Scripting
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, 2.1.14 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-2025-12475?
CVE-2025-12475 has a medium severity rating due to its potential for Stored Cross-Site Scripting attacks.
How do I fix CVE-2025-12475?
To mitigate CVE-2025-12475, upgrade the Blocksy Companion plugin to version 2.1.15 or later.
Which versions of Blocksy Companion are affected by CVE-2025-12475?
CVE-2025-12475 affects all versions of Blocksy Companion up to and including 2.1.14.
What type of attack does CVE-2025-12475 enable?
CVE-2025-12475 enables Stored Cross-Site Scripting, allowing attackers to inject malicious scripts.
Is user input validation adequate in Blocksy Companion prior to fixing CVE-2025-12475?
No, user input validation and output escaping were insufficient in the affected versions of Blocksy Companion.