CVE-2025-9565

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

6.4 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

0.25%Up 0.2 points since Sep 17, 2025

What each source reports

CVE List Score used 6.4

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

Record: CVE-2025-9565
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2025-29692 6.4

Record: EUVD-2025-29692
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-95c9-mv7r-2wgh 6.4

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

Record: GHSA-95c9-mv7r-2wgh
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

NVD 6.4

Record: CVE-2025-9565
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

Affected products

creativethemeshq blocksy companion

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-9565 is a medium vulnerability (CVSS 6.4) in Creativethemeshq Blocksy Companion, published September 17, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 17th percentile. No source names a fixed version.