CVE-2026-6378

MEDIUM

Maxi Blocks <= 2.1.9 - Authenticated (Author+) Stored Cross-Site Scripting via Style Card REST API

Title source: cna
STIX 2.1

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.

References (10)

Core 10
Core References

Scores

CVSS v3 6.4
EPSS 0.0006
EPSS Percentile 19.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
ckp267/MaxiBlocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites < 2.1.9
Published May 02, 2026
Tracked Since May 02, 2026