PT-2025-38124 · WordPress · Blocksy Companion

Dj + 1 · Published 2025-09-17 · Updated 2025-09-17 · CVE-2025-9565

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Blocksy Companion plugin for WordPress versions up to and including 2.1.10

Description The Blocksy Companion plugin for WordPress is susceptible to Stored Cross-Site Scripting through the blocksy newsletter subscribe shortcode. Insufficient input sanitization and output escaping on user-supplied attributes allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages. These scripts will execute when a user accesses the injected page.

Recommendations Update the Blocksy Companion plugin to a version later than 2.1.10.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-9565

Affected Products

Blocksy Companion

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2025-9565 · Security Note
• https://plugins.trac.wordpress.org/changeset/3360000/blocksy-companion/trunk/framework/extensions/newsletter-subscribe/helpers.php · Note
• https://twitter.com/VulmonFeeds/status/1968229393056014568 · Twitter Post
• https://wordfence.com/threat-intel/vulnerabilities/id/c28e740e-9337-41b5-a8e7-ca68e41eaed4?source=cve · Note
• https://twitter.com/CVEnew/status/1968349189789905113 · Twitter Post
• https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.9/framework/extensions/newsletter-subscribe/extension.php#L191 · Note
• https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.9/framework/extensions/newsletter-subscribe/helpers.php#L65 · Note
• https://wordpress.org/plugins/blocksy-companion · Note
• https://t.me/CVEtracker/32729 · Telegram Post