What the vulnerability does
01Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Rustaurius Ultimate WP Mail ultimate-wp-mail allows Stored XSS.This issue affects Ultimate WP Mail: from n/a through <= 1.3.8.
Explanation of Vulnerability in Simple Terms
02Summary
Ultimate WP Mail versions 1.3.8 and earlier contain a cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers when they interact with affected pages. The vulnerability requires user interaction and can affect the confidentiality, integrity, and availability of the site.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers to steal data, modify content, or disrupt site functionality.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other users' sessions, potentially compromising admin accounts or site data.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account and the victim must visit or interact with a page containing the injected payload.
Key dates
06Disclosure timeline
September 22, 2025
CVE published
April 28, 2026
Record updated