CVE-2025-15021

The Gotham Block Extra Light plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 1.5.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

• CWE-79

• https://plugins.trac.wordpress.org/browser/gotham-block-extra-light/trunk/gothamblock.php?marks=463,470,495,500,504,519,564,578#L463
• https://plugins.trac.wordpress.org/changeset/3438393/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/b4c36899-3c7b-41b6-a38d-86c8834b4c03?source=cve

Published

Jan 14, 2026

Last Modified

Jun 17, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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