CVE-2024-13803 Cross-site scripting in Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
Authenticated attackers can inject arbitrary scripts via the data-marker parameter, 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-2024-13803?
CVE-2024-13803 is a medium-severity cross-site scripting vulnerability in wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns, published on 26 Feb 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 ‘data-marker’ parameter in all versions up to, and including, 5.2.3 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-2024-13803?
It affects 1 product.
Products include Wpdeveloper Essential Blocks.
How do I fix CVE-2024-13803?
No fix has been published for CVE-2024-13803 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-2024-13803 being exploited?
There is no known exploitation of CVE-2024-13803 in the wild and no public exploit code.
Other vulnerabilities in wpdevteam Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
- CVE-2023-6623 Essential Blocks < 4.4.3 - Unauthenticated Local File Inclusion
- CVE-2023-4386 Essential Blocks <= 4.2.0 - Unauthenticated PHP Object Injection via queries
- CVE-2023-4402 Essential Blocks <= 4.2.0 - Unauthenticated PHP Object Injection via products
- CVE-2022-47594 WordPress Essential Blocks for Gutenberg plugin <= 3.8.5 - Broken Access Control
- CVE-2023-51360 WordPress Essential Blocks plugin <= 4.2.0 - Multiple Subscriber+ Broken Access Control vulnerability
Sources
Also known as GHSA-c8qg-683p-cf3w.