What the vulnerability does
01Description
The Super Progressive Web Apps plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `superpwa_settings[offline_message_txt]` setting in all versions up to, and including, 2.2.43. This is due to insufficient input sanitization and output escaping. The offline message value is stored without sanitization, passed to the frontend via `wp_localize_script()` without escaping, and rendered using `innerHTML` in the JavaScript snackbar component. 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 triggers the offline snackbar.
Explanation of Vulnerability in Simple Terms
02Summary
Super Progressive Web Apps versions 2.2.43 and earlier contain a cross-site scripting vulnerability in a high-privilege administrative function. An attacker with admin access can inject malicious scripts that affect other users or the broader site. The vulnerability requires high attack complexity and admin credentials to exploit, limiting its practical risk.
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 compromise could allow script injection affecting other users or site behavior.
Conditions required to exploit
05Prerequisites
Attacker must have administrator-level access to the WordPress site.
Key dates
06Disclosure timeline
August 5, 2026
CVE published
