Medium severity6.4NVD Advisory· Published May 2, 2026· Updated May 5, 2026
CVE-2026-6378
CVE-2026-6378
Description
The Maxi Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the /wp-json/maxi-blocks/v1.0/style-card REST API endpoint in all versions up to, and including, 2.1.9 due to insufficient input sanitization and output escaping of the sc_styles parameter. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts that execute on every page where the plugin's style card styles are loaded, including across the entire WordPress admin panel.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
10- github.com/maxi-blocks/maxi-blocks/pull/6250/changes/8db3267df9858f684e420566227ed2ea7954d9a9nvd
- plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.phpnvd
- plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.phpnvd
- plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.phpnvd
- plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.phpnvd
- plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.phpnvd
- plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-api.phpnvd
- plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-api.phpnvd
- plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-style-cards.phpnvd
- www.wordfence.com/threat-intel/vulnerabilities/id/22f05048-df38-4f26-82a3-53caac995283nvd
News mentions
2- Wordfence Intelligence Weekly WordPress Vulnerability Report (April 27, 2026 to May 3, 2026)Wordfence Blog · May 7, 2026
- Wordfence Intelligence Weekly WordPress Vulnerability Report (April 20, 2026 to April 26, 2026)Wordfence Blog · Apr 30, 2026