CVE-2026-104762
Kadence Blocks <= 3.7.12 - Authenticated (Author+) Stored Cross-Site Scripting via Block Font Family Attribute
- State
- Published
- Severity
- 6.4 Medium
- Published
- Oct 10, 2026
- Updated
- Oct 11, 2026
- Reserved
- Oct 2, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | Wordfence |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
Kadence Blocks — Page Builder Toolkit for Gutenberg Editorstellarwp |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c5c83ab8-91d4-488e-903d-2a4b7f0dfe7d?source=cve
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.12/includes/class-kadence-blocks-frontend.php#L379
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.12/includes/class-kadence-blocks-frontend.php#L377
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.12/includes/class-kadence-blocks-google-fonts.php#L152
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.12/includes/class-kadence-blocks-css.php#L2516
- https://plugins.trac.wordpress.org/browser/kadence-blocks/tags/3.7.12/includes/class-kadence-blocks-css.php#L858
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3731453%40kadence-blocks&new=3731453%40kadence-blocks
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