MEDIUM 6.4 NVD
CVE-2026-18488
The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'tagName' Block Attribute (blocksy/dynamic-data) in all versions up
The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'tagName' Block Attribute (blocksy/dynamic-data) in all versions up to, and including, 2.1.51 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
References
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.4/framework/features
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.4/framework/features
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.4/framework/features
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.4/static/js/editor/b
- https://plugins.trac.wordpress.org/browser/blocksy-companion/tags/2.1.51/framework/feature
This medium severity vulnerability with a CVSS score of 6.4 was published on 2026-09-01 via NVD.
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