What the vulnerability does
01Description
The Oboxmedia Ads plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'before_widget' and 'after_widget' parameters of the oboxads-ad-widget shortcode in all versions up to, and including, 1.9.8. This is 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
Oboxmedia Ads versions 1.9.8 and earlier contain a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts. The vulnerability has a changed scope, meaning injected code can affect other users and components beyond the vulnerable module. An attacker with low-level account access can craft malicious input that executes in other users' browsers, potentially stealing session data or performing actions on their behalf.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers and affect other site components.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other users and site functionality; requires immediate patching.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the site; no user interaction required from victims.
Key dates
06Disclosure timeline
October 22, 2025
CVE published
April 8, 2026
Record updated
