CVE-2025-27269

Vulnerability

Overview

The .htaccess Login block plugin for WordPress versions 0.9a and earlier suffers from a reflected cross-site scripting (XSS) vulnerability due to improper neutralization of user input during page generation. This allows an attacker to inject arbitrary HTML and JavaScript code into the application's response [1].

Exploitation

Requirements

Exploitation requires user interaction: an attacker must trick a logged-in administrator into clicking a malicious link or visiting a crafted page. No authentication is needed for the attacker, but the victim must have administrative privileges to trigger the vulnerable functionality [1].

Impact

Successful exploitation enables the attacker to execute malicious scripts in the context of the administrator's browser. This can lead to session hijacking, defacement, redirects to malicious sites, or other actions that compromise the WordPress site's security [1].

Mitigation

The plugin vendor has not released a patched version. As an immediate action, users should disable or remove the plugin. Alternatively, Patchstack offers a virtual patch to block attacks until an official fix is available [1].