CVE-2025-62983

Vulnerability

Description

The 'Posts By Tag' WordPress plugin (versions up to and including 3.2.1) fails to properly neutralize user-supplied input during web page generation. This Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) vulnerability, identified as CVE-2025-62983, allows a contributor-level user to store malicious scripts within the application [1].

Exploitation

Requirements

Exploitation requires an authenticated user with contributor-level privileges (or higher) to inject the malicious payload into a post or page. While the attack is initiated by a low-privileged user, successful execution depends on a privileged user (such as an administrator) performing some action (like viewing the injected content) that triggers the script. The generated payload then executes in the browser of anyone visiting the affected website [1].

Impact

A successful attack allows a threat actor to inject arbitrary HTML and JavaScript, which may include redirects, advertisements, or other malicious payloads. This could lead to widespread compromise of site visitors, defacement, or further attacks against the WordPress installation. The vulnerability is notable for being used in mass-exploit campaigns targeting thousands of websites regardless of their size or popularity [1].

Mitigation

The issue has been addressed by the plugin developer. Users are strongly advised to update the 'Posts By Tag' plugin to version 3.2.2 or later immediately. If an update is not possible, site owners should contact their hosting provider or web developer for assistance [1].