What the vulnerability does
01Description
The Quill Forms | The Best Typeform Alternative | Create Conversational Multi Step Form, Survey, Quiz, Cost Estimation or Donation Form on WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'quillforms-popup' shortcode in all versions up to, and including, 3.10.0 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
Explanation of Vulnerability in Simple Terms
02Summary
Quill Forms versions 3.10.0 and earlier contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts. The vulnerability affects the form builder interface and can impact other users viewing or interacting with affected forms. The flaw requires low-level authentication but no user interaction from the victim.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that executes in other users' browsers when they view or interact with forms.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other site visitors; data theft, session hijacking, or malware distribution possible.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account (e.g., contributor or subscriber role) on the site.
Key dates
06Disclosure timeline
January 7, 2025
CVE published
May 20, 2026
Record updated
