CVE-2026-4085

The Easy Social Photos Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'wrapper_class' shortcode attribute of the 'my-instagram-feed' shortcode in all versions up to, and including, 3.1.2. This is due to insufficient input sanitization and output escaping on user supplied attributes. Specifically, the plugin uses sanitize_text_field() instead of esc_attr() when outputting the 'wrapper_class' attribute inside a double-quoted HTML class attribute. Since sanitize_text_field() does not encode double quotes, an attacker can break out of the class attribute and inject arbitrary HTML event handlers. 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/my-instagram-feed/tags/3.1.2/frontend/class-my-instagram-feed-frontend.php#L53
• https://plugins.trac.wordpress.org/browser/my-instagram-feed/tags/3.1.2/frontend/views/feed.php#L102
• https://plugins.trac.wordpress.org/browser/my-instagram-feed/trunk/frontend/class-my-instagram-feed-frontend.php#L53
• https://plugins.trac.wordpress.org/browser/my-instagram-feed/trunk/frontend/views/feed.php#L102
• https://www.wordfence.com/threat-intel/vulnerabilities/id/8640724c-0bd4-4684-9fd1-027f2af64e67?source=cve

Published

Apr 22, 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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