What the vulnerability does
01Description
The Smart App Banners plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'size' and 'verticalalign' parameters of the 'app-store-download' shortcode in all versions up to, and including, 1.2 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
Smart App Banners versions 1.2 and earlier contain a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts. The vulnerability has a changed scope, meaning injected code can affect other users and site functionality beyond the vulnerable component. Low-privileged accounts can exploit this without user interaction.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that executes in other users' browsers and affects site functionality.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other visitors and site behavior; potential for credential theft or malware distribution.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privileged account on the site; no user interaction required.
Key dates
06Disclosure timeline
January 7, 2026
CVE published
April 8, 2026
Record updated
