6.4
Medium
CVE-2026-18488 The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'tagName' Block Attribute…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Blocksy Companion 2.1 | earliest → 2.1.51 | No fix stated |
Other CVEs of Blocksy Companion
The 10 CVEs of Blocksy Companion →
CVE-2026-107645
The Blocksy Companion plugin for WordPress is vulnerable to privilege escalation in versions up to, and including,…
9.1
Critical
CVE-2026-15158
The Blocksy Companion plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and…
9.8
Critical
CVE-2026-12430
The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all…
4.4
Medium
CVE-2025-12846
The Blocksy Companion plugin for WordPress is vulnerable to authenticated arbitrary file upload in all versions up to,…
8.8
High