What the vulnerability does
01Description
The rexCrawler plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'url' and 'regex' parameters in the search-pattern tester page in all versions up to, and including, 1.0.15 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick an administrator into performing an action such as clicking on a link. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Explanation of Vulnerability in Simple Terms
02Summary
rexCrawler versions 1.0.15 and earlier contain a cross-site scripting (XSS) vulnerability. An attacker can inject malicious scripts that execute in a victim's browser when they visit a crafted link or page. The vulnerability affects the application's scope, potentially impacting other users or components. No authentication is required to exploit this flaw.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in a victim's browser to steal data or perform actions on their behalf.
Potential impact on your site
04Site Impact
Users visiting rexCrawler could have their sessions hijacked, credentials stolen, or be redirected to malicious sites.
Conditions required to exploit
05Prerequisites
Victim must click a malicious link or visit an attacker-controlled page while using rexCrawler.
Key dates
06Disclosure timeline
March 21, 2026
CVE published
April 8, 2026
Record updated
