What the vulnerability does
01Description
The pdfl.io plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'pdflio' shortcode in all versions up to, and including, 1.0.5. This is due to insufficient input sanitization and output escaping on the 'text' shortcode attribute. The output_shortcode() function directly concatenates the user-supplied $text variable into HTML output without applying esc_html() or any other escaping function. 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
pdfl.io versions 1.0.5 and earlier contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts affecting other users. The vulnerability exists because user input is not properly sanitized before being displayed. An attacker with low-level account access can craft a payload that executes in other users' browsers, potentially stealing session data or performing actions on their behalf.
What an attacker can do
03Attacker Capabilities
Inject and execute malicious JavaScript in other users' browsers to steal data or perform unauthorized actions.
Potential impact on your site
04Site Impact
Authenticated users' accounts and data are at risk; attackers can hijack sessions or modify content visible to other users.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the site; no user interaction required from the victim.
Key dates
06Disclosure timeline
April 8, 2026
CVE published
April 8, 2026
Record updated
