What the vulnerability does
01Description
The Express Payment For Stripe plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'type' attribute of the [stripe-express] shortcode in versions up to, and including, 1.28.0. This is due to insufficient input sanitization and output escaping on the shortcode attribute value, which is concatenated into an HTML attribute in the rendered output of the register_shortcode() function without being passed through esc_attr() or any other escaping function. 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
Express Payment For Stripe versions up to 1.28.0 contain a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in the browsers of other users, including administrators. The vulnerability affects the entire site scope due to how the application processes and displays user input without proper sanitization.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers and steal their session tokens or perform actions on their behalf.
Potential impact on your site
04Site Impact
Any authenticated user can compromise admin accounts and modify site content or settings through stored XSS attacks.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the site; no user interaction required from victims.
Key dates
06Disclosure timeline
June 5, 2026
CVE published
June 6, 2026
Record updated
