What the vulnerability does
01Description
The ThemeRuby Multi Authors – Assign Multiple Writers to Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'before' and 'after' shortcode attributes in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping. 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 ThemeRuby Multi Authors plugin for WordPress contains a cross-site scripting (XSS) vulnerability in versions up to 1.0.0. An authenticated user with low privileges can inject malicious scripts that execute in the browsers of other site users, potentially compromising their accounts or stealing sensitive data. The vulnerability affects the entire site scope due to how the plugin processes user input.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers and steal their session data or perform actions on their behalf.
Potential impact on your site
04Site Impact
Site users' accounts and data are at risk; attackers can impersonate users or deface content across your site.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account (e.g., contributor or author role) and network access to the site.
Key dates
06Disclosure timeline
January 24, 2026
CVE published
April 8, 2026
Record updated
