CVE-2025-31925

Vulnerability

Details

The SHOUT plugin (lbg-audio8-html5-radio_ads) for WordPress versions through 3.5.3 contains a reflected Cross-Site Scripting (XSS) vulnerability. The issue stems from improper neutralization of user-supplied input during web page generation, meaning the plugin fails to sanitize or escape certain query parameters before embedding them in server-generated HTML responses [1].

Exploitation

Scenario

An attacker can craft a malicious link containing a payload in a parameter that the plugin reflects without proper encoding. Exploitation requires user interaction — a privileged user must click the crafted link, visit a specially prepared page, or submit a malicious form. No authentication is needed to launch the attack, but the victim must be logged in to the WordPress admin or have a role that triggers the reflected payload [1].

Potential

Impact

Successful exploitation allows the attacker to inject arbitrary HTML and JavaScript into the context of the victim's browser session. This can be leveraged to perform actions like redirecting visitors to malicious sites, displaying unauthorized advertisements, stealing session cookies, or defacing the site. The vulnerability is considered moderately dangerous and is expected to be used in mass-exploit campaigns targeting thousands of sites [1].

Mitigation

Status

Users should update the SHOUT plugin to a patched version beyond 3.5.3 as soon as one becomes available. A mitigation rule from Patchstack is available for those who cannot immediately patch; alternatively, site administrators can consult their hosting provider for temporary workarounds [1].