What the vulnerability does
01Description
The Internal Link Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 1.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions 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
Internal Link Builder versions 1.0 and earlier contain a cross-site scripting (XSS) vulnerability that allows high-privilege users to inject malicious scripts. The vulnerability has limited scope and requires high attack complexity. An attacker with administrative access can craft malicious input that executes in other users' browsers, potentially compromising site security or user data.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers when they view affected pages.
Potential impact on your site
04Site Impact
A compromised admin account could inject scripts affecting other users; limit exposure by restricting admin access.
Conditions required to exploit
05Prerequisites
Attacker must have high-level administrative privileges and craft a specially designed input.
Key dates
06Disclosure timeline
January 14, 2026
CVE published
April 8, 2026
Record updated
