Unauthenticated XSS in Advanced AJAX Product Filters

Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability affecting the Advanced AJAX Product Filters WordPress plugin versions 3.2.0.3 and below. It allows attackers to inject malicious scripts into websites without authentication. The vulnerability has a CVSS score of 7.1 and requires user interaction to exploit.

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Detection Guidance

Detecting this XSS vulnerability requires checking if the Advanced AJAX Product Filters plugin version 3.2.0.3 or below is installed. Inspect WordPress plugin directories for the plugin folder and examine the version in the plugin's main file. Look for suspicious user input handling in the plugin's AJAX endpoints or frontend filters.

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Impact Analysis

Attackers can inject malicious scripts that may redirect visitors, display unwanted ads, or execute harmful HTML payloads when users access the site. Exploitation requires users to click a malicious link or visit a crafted page, but it can be initiated by unauthenticated users.

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Mitigation Strategies

Immediately update the Advanced AJAX Product Filters plugin to version 3.2.1 or later. If updating is not possible, apply the mitigation rule provided by Patchstack to block attacks until the update is applied. Remove or disable the plugin if no update is available.

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