What the vulnerability does
01Description
The Stumble! for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the `$_SERVER['PHP_SELF']` variable in all versions up to, and including, 1.1.1 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 a user into performing an action such as clicking on a link.
Explanation of Vulnerability in Simple Terms
02Summary
Stumble! for WordPress versions 1.1.1 and earlier contain a cross-site scripting (XSS) vulnerability. An attacker can inject malicious scripts that execute in a visitor's browser when they view an affected page. The vulnerability requires user interaction—the victim must visit a crafted link. The impact is limited to session hijacking or credential theft from individual users, not site-wide compromise.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that runs in visitors' browsers to steal session cookies or credentials.
Potential impact on your site
04Site Impact
Visitors to your site may have their sessions hijacked or credentials stolen if they click a malicious link.
Conditions required to exploit
05Prerequisites
No authentication required. Victim must click a malicious link or visit an attacker-controlled page.
Key dates
06Disclosure timeline
January 7, 2026
CVE published
April 8, 2026
Record updated