What the vulnerability does
01Description
The MW WP Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'memo' parameter in all versions up to, and including, 5.1.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Because the memo value is stored via update_post_meta() rather than wp_insert_post(), WordPress's built-in kses and unfiltered_html protections do not apply, allowing attackers to break out of the textarea element via injected closing tags regardless of role-based content filtering.
Explanation of Vulnerability in Simple Terms
02Summary
MW WP Form versions up to 5.1.3 contain a cross-site scripting (XSS) vulnerability that allows high-privilege users to inject malicious scripts affecting other users or the site. The vulnerability requires high attack complexity and high privileges to exploit. The impact is limited to low-level confidentiality and integrity compromise.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers or affect site functionality.
Potential impact on your site
04Site Impact
A privileged user could inject scripts to steal data from other users or modify site content, but impact is limited.
Conditions required to exploit
05Prerequisites
Attacker must have high-level privileges (e.g., administrator or editor role) and the attack requires specific conditions to succeed.
Key dates
06Disclosure timeline
June 10, 2026
CVE published
June 10, 2026
Record updated
