CVE-2025-1664 Cross-site scripting in Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns

Medium 6.4 Published 8 Mar 2025 Updated 8 Apr 2026

Authenticated contributors can inject arbitrary scripts via the Parallax slider, leading to stored XSS execution for other users.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-1664?

CVE-2025-1664 is a medium-severity cross-site scripting vulnerability in wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns, published on 8 Mar 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Parallax slider in all versions up to, and including, 5.3.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Weakness: CWE-79

Which versions are affected by CVE-2025-1664?

It affects 1 product.

Products include Wpdeveloper Essential Blocks.

How do I fix CVE-2025-1664?

No fix has been published for CVE-2025-1664 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-1664 being exploited?

There is no known exploitation of CVE-2025-1664 in the wild and no public exploit code.

Sources

Also known as GHSA-x53r-mfrq-c435.