CVE-2026-6378
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.
Published:May 2, 2026
Last Modified:May 4, 2026
EPS:May 2, 2026
EPSS Score:0.00056
CVSS Score:6.4
Affected Products
Vendor
Product
Action
Vendor
Ckp267
Product
Maxiblocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites
Ckp267
Maxiblocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites
Vendor
Wordpress
Product
Wordpress
Wordpress
Wordpress
Exploits
No exploit reference
Common Weakness Enumeration
Common Attack Pattern Enumeration and Classification (CAPEC)
References
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
