Home

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.

PUBLISHED Reserved 2026-04-15 | Published 2026-05-02 | Updated 2026-05-04 | Assigner Wordfence




MEDIUM: 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

Any version
affected

Timeline

2026-04-16:Vendor Notified
2026-05-01:Disclosed

Credits

Athiwat Tiprasaharn finder

References

www.wordfence.com/...-df38-4f26-82a3-53caac995283?source=cve

plugins.trac.wordpress.org/.../2.1.9/core/class-maxi-api.php

plugins.trac.wordpress.org/.../2.1.9/core/class-maxi-api.php

plugins.trac.wordpress.org/...ore/class-maxi-style-cards.php

github.com/...anges/8db3267df9858f684e420566227ed2ea7954d9a9

plugins.trac.wordpress.org/...2.1.10/core/class-maxi-api.php

plugins.trac.wordpress.org/...2.1.10/core/class-maxi-api.php

plugins.trac.wordpress.org/...2.1.10/core/class-maxi-api.php

plugins.trac.wordpress.org/...2.1.10/core/class-maxi-api.php

plugins.trac.wordpress.org/...2.1.10/core/class-maxi-api.php

cve.org (CVE-2026-6378)

nvd.nist.gov (CVE-2026-6378)

Download JSON