What the vulnerability does
01Description
The Wikilookup plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Popup Width' setting in all versions up to, and including, 1.1.5. This is due to insufficient input sanitization and output escaping. 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 accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Explanation of Vulnerability in Simple Terms
02Summary
Wikilookup versions 1.1.5 and earlier contain a cross-site scripting (XSS) vulnerability that allows high-privilege users to inject malicious scripts. The vulnerability has limited scope but can affect other users or components. An attacker must have high-level administrative access and the impact is restricted to low-level data exposure or modification.
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
A compromised admin account could inject scripts affecting other users or site behavior.
Conditions required to exploit
05Prerequisites
Attacker must have high-level administrative privileges on the site.
Key dates
06Disclosure timeline
March 21, 2026
CVE published
April 8, 2026
Record updated
