CVE-2026-3659

The WP Circliful plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id' shortcode attribute of the [circliful] shortcode and via multiple shortcode attributes of the [circliful_direct] shortcode in all versions up to and including 1.2. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. Specifically, in the circliful_shortcode() function, the 'id' attribute value is concatenated directly into an HTML id attribute (line 285) without any escaping, allowing an attacker to break out of the double-quoted attribute and inject arbitrary HTML event handlers. Similarly, the circliful_direct_shortcode() function (line 257) outputs all shortcode attributes directly into HTML data-* attributes without escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

• CWE-79

• https://plugins.trac.wordpress.org/browser/wp-circliful/tags/1.2/wp-circliful.php#L241
• https://plugins.trac.wordpress.org/browser/wp-circliful/tags/1.2/wp-circliful.php#L257
• https://plugins.trac.wordpress.org/browser/wp-circliful/tags/1.2/wp-circliful.php#L263
• https://plugins.trac.wordpress.org/browser/wp-circliful/tags/1.2/wp-circliful.php#L285
• https://plugins.trac.wordpress.org/browser/wp-circliful/trunk/wp-circliful.php#L241
• https://plugins.trac.wordpress.org/browser/wp-circliful/trunk/wp-circliful.php#L257
• https://plugins.trac.wordpress.org/browser/wp-circliful/trunk/wp-circliful.php#L263
• https://plugins.trac.wordpress.org/browser/wp-circliful/trunk/wp-circliful.php#L285
• https://www.wordfence.com/threat-intel/vulnerabilities/id/030534e2-bf7d-42e4-94a1-986f629bea15?source=cve

Published

Apr 15, 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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