The Highlighting Code Block plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 2.2.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Highlighting Code Block Plugin | — | Update highlighting-code-block plugin to version 2.2.1, or a newer patched version | Jul 10, 2026 | Jul 9, 2026 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub