WordPress security changelog
MEDIUM CVE-2026-6378 Deferred

MaxiBlocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites: Cross-site scripting

MaxiBlocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites is affected by cross-site scripting. Exploitation requires at least author-level access. Injected script can execute in the affected site's origin when the vulnerable output is viewed. The published affected range is <= 2.1.9.

CVE / CNA score 6.4 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
MaxiBlocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites
Plugin slug
maxi-blocks
Affected
<= 2.1.9
Safe version
> 2.1.9
Published
May 02, 2026
Weakness
CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published May 02, 2026 and is one of 5 known issues for this plugin.

What to do

Update, patch or deactivate.

Update MaxiBlocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites to a release after 2.1.9, or disable and remove it until a fixed version is available.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical 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.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References

Primary and upstream sources