CVE-2025-30943

A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the Posts Slider Shortcode plugin for WordPress, versions up to and including 1.0. The vulnerability stems from improper neutralization of user-controllable input during web page generation, which enables an attacker to inject malicious scripts into the plugin's output [1].

Exploitation requires user interaction, such as clicking a crafted link or visiting a specially prepared page. The vulnerability is classified as Medium severity with a CVSS v3 score of 6.5, and can be triggered by any authenticated user with the necessary privileges [1]. Attackers commonly chain such flaws in mass-exploit campaigns targeting thousands of websites.

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of a victim's browser session. This can be used to steal session cookies, redirect visitors to malicious sites, inject unwanted advertisements, or deface the website [1].

The vulnerability is addressed by updating the Posts Slider Shortcode plugin to a patched version. If an update is not available, users are advised to contact their hosting provider or web developer for remediation guidance [1].