CVE-2026-120550

The WP User Manager – Registration Form, Login Form, User Profile Builder & Member Directory plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'name (REST users endpoint) -> wp_users.display_name' parameter in all versions up to, and including, 2.10.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is stored via the WordPress core REST endpoint POST /wp-json/wp/v2/users/me, which bypasses the plugin's own wpum_sanitize_text sanitizer applied on its front-end account form, making the save-time sanitization ineffective as a mitigation.

• https://downloads.wordpress.org/plugin/wp-user-manager.2.10.3.zip
• https://plugins.trac.wordpress.org/browser/wp-user-manager/tags/2.10.2/includes/fields/class-wpum-field.php#L627
• https://plugins.trac.wordpress.org/browser/wp-user-manager/tags/2.10.2/includes/fields/types/class-wpum-field-dropdown.php#L60
• https://plugins.trac.wordpress.org/browser/wp-user-manager/tags/2.10.2/includes/fields/wpum-fields-functions.php#L578
• https://plugins.trac.wordpress.org/browser/wp-user-manager/tags/2.10.2/templates/profiles/about.php#L51
• https://www.wordfence.com/threat-intel/vulnerabilities/id/3e9da4a7-89ba-426c-943a-e7bc79a04d7c?source=cve

• MEDIUMCVE-2012-20003PoC
• MEDIUMCVE-2012-20004PoC
• MEDIUMCVE-2012-20005PoC
• MEDIUMCVE-2013-20009PoC
• MEDIUMCVE-2014-125131PoC
• MEDIUMCVE-2014-125132PoC
• MEDIUMCVE-2015-20130PoC
• MEDIUMCVE-2016-20098PoC

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