CVE-2025-9565 - Blocksy Companion <= 2.1.10 - Authenticated (Contributor+) Stored Cross-Site Scripting via blocksy_newsletter_subscribe Shortcode

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MEDIUM

Blocksy Companion <= 2.1.10 - Authenticated (Contributor+) Stored Cross-Site Scripting via blocksy_newsletter_subscribe Shortcode

Published Sep 17, 2025

6.4

MEDIUM

CVSS 3.1

EPSS 0.25%

Description

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, 2.1.10 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 products

Vendor Creativethemeshq Product Blocksy Companion Default
unaffected
- Version
  -
  Status
  affected
  Constraints
  <=2.1.10

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Creativethemeshq

Blocksy Companion

unaffected

Version	Status	Constraints
-	affected	<=2.1.10

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (6)

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-29692		Advisory
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.9/framework/extensions/newsletter-subscribe/extension.php#L191
https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.9/framework/extensions/newsletter-subscribe/helpers.php#L65
https://plugins.trac.wordpress.org/changeset/3360000/blocksy-companion/trunk/framework/extensions/newsletter-subscribe/helpers.php
https://wordpress.org/plugins/blocksy-companion/
https://www.wordfence.com/threat-intel/vulnerabilities/id/c28e740e-9337-41b5-a8e7-ca68e41eaed4?source=cve