What the vulnerability does
01Description
The WP ULike plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `[wp_ulike_likers_box]` shortcode `template` attribute in all versions up to, and including, 5.0.1. This is due to the use of `html_entity_decode()` on shortcode attributes without subsequent output sanitization, which effectively bypasses WordPress's `wp_kses_post()` content filtering. 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. The post must have at least one like for the XSS to render.
Explanation of Vulnerability in Simple Terms
02Summary
WP ULike versions up to 5.0.1 contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts. The vulnerability has changed scope, meaning injected code can affect other users and site functionality beyond the plugin itself. An attacker with low-level WordPress access can craft malicious input that executes in other users' browsers.
What an attacker can do
03Attacker Capabilities
Inject JavaScript that runs in other users' browsers and affects site functionality.
Potential impact on your site
04Site Impact
Authenticated attackers can steal session cookies, deface content, or redirect users to malicious sites.
Conditions required to exploit
05Prerequisites
Attacker must have a low-level WordPress user account (e.g., subscriber or contributor).
Key dates
06Disclosure timeline
March 11, 2026
CVE published
April 8, 2026
Record updated
