CVE-2026-104762 Kadence Blocks <= 3.7.12 - Authenticated (Author+) Stored Cross-Site Scripting via Block Font Family Attribute
Authenticated attackers can inject arbitrary scripts via font attributes in Kadence Blocks when local font loading is enabled.
- 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-2026-104762?
CVE-2026-104762 is a medium-severity cross-site scripting vulnerability in stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor, published on 10 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Block Font Family Attribute in all versions up to, and including, 3.7.12 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. This encoding bypass is only triggered when the "Load Google Fonts Locally" site option (kadence_blocks_font_settings['load_fonts_local']) is enabled, which is not the default configuration.
Weakness: CWE-79
Which versions are affected by CVE-2026-104762?
How do I fix CVE-2026-104762?
No fix has been published for CVE-2026-104762 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-2026-104762 being exploited?
There is no known exploitation of CVE-2026-104762 in the wild and no public exploit code.
Sources
Also known as GHSA-jpmh-c343-hr2f.