CVE-2025-62124

Vulnerability

Overview

The WP Post Signature plugin for WordPress, versions 0.4.1 and earlier, contains a stored cross-site scripting (XSS) vulnerability due to improper neutralization of user input during web page generation [1]. This allows attackers to inject arbitrary HTML and JavaScript code that gets stored on the server and executed in the browsers of visitors.

Exploitation

Details

Exploitation requires a privileged user, such as an administrator, to perform an action like clicking a malicious link or submitting a crafted form [1]. The vulnerability is classified as stored XSS, meaning the injected payload persists and affects all subsequent visitors to the compromised page. No special network position is needed; the attack can be initiated remotely.

Impact

Successful exploitation enables an attacker to inject malicious scripts, including redirects, advertisements, and other HTML payloads, into the website [1]. These scripts execute when guests visit the affected page, potentially leading to data theft, defacement, or further compromise. The vulnerability is noted as being used in mass-exploit campaigns targeting thousands of websites.

Mitigation

The vendor has not released a patched version beyond 0.4.1, so users should immediately update the plugin if a newer version is available. If updating is not possible, users are advised to contact their hosting provider or web developer for assistance [1].