CVE-2026-103354 WordPress Gutenberg Blocks by Kadence Blocks plugin <= 3.7.11.1 - Cross Site Scripting (XSS) vulnerability
Stored XSS in Kadence Blocks allows attackers to inject malicious scripts into WordPress pages, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-103354?
CVE-2026-103354 is a high-severity cross-site scripting vulnerability in Liquid Web / StellarWP Gutenberg Blocks by Kadence Blocks, published on 4 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Liquid Web / StellarWP Gutenberg Blocks by Kadence Blocks kadence-blocks allows Stored XSS.This issue affects Gutenberg Blocks by Kadence Blocks: from n/a through 3.7.11.1.
Weakness: CWE-79
Which versions are affected by CVE-2026-103354?
How do I fix CVE-2026-103354?
No fix has been published for CVE-2026-103354 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-2026-103354 being exploited?
There is no known exploitation of CVE-2026-103354 in the wild and no public exploit code.
Sources
Also known as GHSA-fqfj-m5mc-j28g.