What the vulnerability does
01Description
The Extra Settings for RocketChat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'rocketchat' shortcode's 'title' attribute in versions up to, and including, 0.1. This is due to insufficient input sanitization and output escaping in the rxstg_shortcode() function, which concatenates the user-supplied 'title' attribute directly into HTML output. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
The Extra Settings for RocketChat extension contains a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts. These scripts execute in the browsers of other users viewing affected pages, potentially compromising their sessions or stealing sensitive data. The vulnerability affects versions 0.1 and earlier. Update to a version newer than 0.1 to remediate.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers and steal their session data or credentials.
Potential impact on your site
04Site Impact
Authenticated users' sessions and data can be compromised; attackers can impersonate users or access sensitive information.
Conditions required to exploit
05Prerequisites
Attacker must have a valid RocketChat user account with low-level privileges; no user interaction required.
Key dates
06Disclosure timeline
June 9, 2026
CVE published
June 9, 2026
Record updated
