---
id: CVE-2025-12475
title: >-
  The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the plugin's 'blocksy_newsletter_subscribe' shortcode in all
  versions up to, and including, 2.1.14 due to insufficient input sanitization
  and out…
summary: >-
  The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the plugin's 'blocksy_newsletter_subscribe' shortcode in all
  versions up to, and including, 2.1.14 due to insufficient input sanitization
  and out…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2025-10-30'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T10:10:00.227'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-12475'
references:
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3371878/blocksy-companion/trunk/framework/extensions/newsletter-subscribe/helpers.php
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/dd13eb67-3bd5-41c4-a47f-5f55656ea5b9?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00201
epssPercentile: 0.09072
ingestedAt: '2026-10-08T10:28:18.504Z'
---

## Overview

The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'blocksy_newsletter_subscribe' 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.