CVE-2024-4158: Creativethemes Blocksy

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Blocksy theme for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘tagName’ parameter in versions up to, and including, 2.0.42 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• Creativethemes Blocksy: before 2.0.43 (fixed in 2.0.43)

Published 2024-05-14. Last modified 2026-06-17.