What the vulnerability does
01Description
Joomla Extension - joomlaeventmanager.net - Reflected XSS via the PDF export link in Joomla Events Manager < 5.0.1 - buildCurrentPdfLink copies the current request query string into the PDF button URL, and pdfbutton() echoes it unescaped, leading to an reflected XSS vector.
Explanation of Vulnerability in Simple Terms
02Summary
JEM - Joomla Event Manager contains a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into the application. An attacker can craft a malicious link or page that, when visited by a site user, executes arbitrary JavaScript in the victim's browser. This can lead to session hijacking, credential theft, or defacement of site content.
What an attacker can do
03Attacker Capabilities
Inject and execute malicious JavaScript in a user's browser to steal session cookies or credentials.
Potential impact on your site
04Site Impact
Site visitors' sessions and login credentials are at risk if they interact with malicious content targeting this vulnerability.
Conditions required to exploit
05Prerequisites
A site user must click a malicious link or visit an attacker-controlled page that triggers the vulnerability.
Key dates
06Disclosure timeline
August 27, 2026
CVE published