What the vulnerability does
01Description
The Niche Hero | Beautifully-designed blocks in seconds plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'spacing' parameter of the nh_row shortcode in all versions up to, and including, 1.0.5 due to insufficient input sanitization and output escaping. 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
Niche Hero versions up to 1.0.5 contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts affecting other users. The vulnerability exists because user input is not properly sanitized before being displayed. An attacker with low-level access can craft malicious content that executes in other users' browsers, potentially stealing session data or performing actions on their behalf.
What an attacker can do
03Attacker Capabilities
Inject JavaScript code that runs in other users' browsers and steals their session data or performs actions as them.
Potential impact on your site
04Site Impact
Authenticated users can be compromised; attackers may steal admin sessions or modify site content without direct admin access.
Conditions required to exploit
05Prerequisites
Attacker must have a low-level user account on the site; no user interaction required from the victim.
Key dates
06Disclosure timeline
January 7, 2026
CVE published
April 8, 2026
Record updated
