What the vulnerability does
01Description
The Outgrow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id' attribute of the 'outgrow' shortcode in all versions up to, and including, 2.1. This is 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
Outgrow versions 2.1 and earlier contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts affecting other users. The vulnerability has a changed scope, meaning the impact extends beyond the vulnerable component itself. Low-privileged accounts can exploit this without user interaction to compromise confidentiality and integrity.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers and affect the site's functionality.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other visitors and site operations; update Outgrow immediately.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privileged account on the site; no user interaction required.
Key dates
06Disclosure timeline
March 21, 2026
CVE published
April 8, 2026
Record updated
