CVE-2026-6378: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ckp267 MaxiBlocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites
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.
AI Analysis
Technical Summary
The Maxi Blocks WordPress plugin suffers from a stored XSS vulnerability (CWE-79) via the sc_styles parameter in its style-card REST API endpoint. This flaw allows authenticated users with Author or higher privileges to inject arbitrary JavaScript that executes in the context of pages loading the affected styles, including the admin interface. The vulnerability arises from inadequate input sanitization and output escaping. The CVSS 3.1 score of 6.4 reflects network attack vector, low attack complexity, required privileges at the Author level, no user interaction, and impacts confidentiality and integrity with no availability impact. No patch or official remediation is currently documented.
Potential Impact
An attacker with Author-level or higher privileges can exploit this vulnerability to execute arbitrary scripts in the context of the WordPress site, potentially leading to session hijacking, privilege escalation, or other malicious actions affecting site confidentiality and integrity. The vulnerability affects all plugin versions up to 2.1.9. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit the assignment of Author-level or higher privileges to trusted users only. Monitor for updates from the plugin vendor and apply patches promptly once available.
CVE-2026-6378: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in ckp267 MaxiBlocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites
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.
CVSS v3.1
Score 6.4medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Maxi Blocks WordPress plugin suffers from a stored XSS vulnerability (CWE-79) via the sc_styles parameter in its style-card REST API endpoint. This flaw allows authenticated users with Author or higher privileges to inject arbitrary JavaScript that executes in the context of pages loading the affected styles, including the admin interface. The vulnerability arises from inadequate input sanitization and output escaping. The CVSS 3.1 score of 6.4 reflects network attack vector, low attack complexity, required privileges at the Author level, no user interaction, and impacts confidentiality and integrity with no availability impact. No patch or official remediation is currently documented.
Potential Impact
An attacker with Author-level or higher privileges can exploit this vulnerability to execute arbitrary scripts in the context of the WordPress site, potentially leading to session hijacking, privilege escalation, or other malicious actions affecting site confidentiality and integrity. The vulnerability affects all plugin versions up to 2.1.9. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit the assignment of Author-level or higher privileges to trusted users only. Monitor for updates from the plugin vendor and apply patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-04-15T17:07:54.863Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f57840cbff5d861067b4cc
Added to database: 5/2/2026, 4:06:24 AM
Last enriched: 5/10/2026, 2:10:25 AM
Last updated: 6/15/2026, 2:55:10 PM
Views: 72
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