What the vulnerability does
01Description
The Simple Plyr plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'poster' parameter in the 'plyr' shortcode in all versions up to, and including, 0.0.1 due to insufficient input sanitization and output escaping on user supplied attributes. 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
Simple Plyr versions 0.0.1 and earlier contain a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts affecting other users. The vulnerability has scope impact, meaning injected code can affect users beyond the immediate vulnerable component. Low-privileged accounts can exploit this without user interaction.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers and affect the site's functionality.
Potential impact on your site
04Site Impact
Authenticated users can inject code affecting other site visitors; data theft, session hijacking, or malware distribution possible.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privileged account; no user interaction required from victims.
Key dates
06Disclosure timeline
February 14, 2026
CVE published
April 8, 2026
Record updated
