What the vulnerability does
01Description
The Alert Box Block – Display notice/alerts in the front end. plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's Alert Box block in all versions up to, and including, 1.1.3 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
Alert Box Block for WordPress contains a stored cross-site scripting (XSS) vulnerability in versions up to 1.1.3. An authenticated user with low privileges can inject malicious JavaScript into alert box content. When other users view the page, the script executes in their browser, potentially allowing session hijacking or credential theft. The vulnerability affects all site visitors due to scope change.
What an attacker can do
03Attacker Capabilities
Inject JavaScript code that runs in other users' browsers when they view pages with the alert box.
Potential impact on your site
04Site Impact
Visitors' sessions and data can be compromised if an attacker injects malicious scripts into alert boxes.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account (e.g., contributor or editor role).
Key dates
06Disclosure timeline
March 25, 2025
CVE published
April 8, 2026
Record updated
