What the vulnerability does
01Description
The Contact Us Simple Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 1.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with administrator-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
Contact Us Simple Form versions 1.0 and earlier contain a cross-site scripting (XSS) vulnerability in form handling. An authenticated administrator with high privileges can inject malicious scripts that affect other users or the site scope. The vulnerability requires specific attack conditions and does not allow code execution or data theft, but can compromise site integrity.
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
An admin account could be compromised to inject scripts affecting other users or site behavior.
Conditions required to exploit
05Prerequisites
Attacker must have high-level administrator privileges and network access to the site.
Key dates
06Disclosure timeline
January 7, 2026
CVE published
April 8, 2026
Record updated