Blocksy Companion <= 2.1.51 - Authenticated (Author+) Stored Cross-Site Scripting via 'tagName' Block Attribute (blocksy/dynamic-data)
| CVE | CVE-2026-18488 |
|---|---|
| CVSS | 6.4 (Medium) |
| Publicly Published | August 31, 2026 |
| Last Updated | September 1, 2026 |
| Researcher |
haofanjiukunle
|
Description
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.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for Blocksy Companion
| Software Type | Plugin |
|---|---|
| Software Slug | blocksy-companion (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 2.1.52, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Blocksy Companion
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