What the vulnerability does
01Description
The WP-WebAuthn plugin for WordPress is vulnerable to Unauthenticated Stored Cross-Site Scripting via the `wwa_auth` AJAX endpoint in all versions up to, and including, 1.3.4 due to insufficient input sanitization and output escaping on user supplied attributes logged by the plugin. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses the plugin's log page, provided that the logging option is enabled in the plugin settings.
Explanation of Vulnerability in Simple Terms
02Summary
WP-WebAuthn versions up to 1.3.4 contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into the site. The vulnerability requires user interaction—typically clicking a malicious link—and can affect other users or administrators who view the injected content. The impact is limited to reading or modifying non-sensitive data within the affected user's session.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in users' browsers when they visit a crafted page or link.
Potential impact on your site
04Site Impact
Users' session data or site content could be read or modified by attackers; admin accounts are at higher risk.
Conditions required to exploit
05Prerequisites
No authentication required. Victim must click a malicious link or visit an attacker-controlled page.
Key dates
06Disclosure timeline
March 21, 2026
CVE published
April 8, 2026
Record updated
