Unauthenticated Cross Site Scripting in Breadcrumb NavXT

Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability in the Breadcrumb NavXT plugin for WordPress versions 7.5.1 and earlier. It allows attackers to inject malicious scripts into websites without needing authentication. These scripts execute when visitors access the site, potentially causing redirects or unwanted content display.

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Detection Guidance

Detecting this XSS vulnerability requires checking if your Breadcrumb NavXT plugin version is 7.5.1 or earlier. Inspect WordPress plugin files for suspicious scripts in breadcrumb output or input fields. Use commands like 'grep -r "breadcrumb_navxt" /path/to/wordpress/plugins/' to locate the plugin version. Monitor web server logs for unusual requests or payloads containing script tags.

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Impact Analysis

This vulnerability can lead to unauthorized script execution on your website, potentially causing redirects to malicious sites, theft of user cookies or session tokens, or display of unwanted content. Attackers could trick users into clicking malicious links to trigger the exploit.

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Compliance Impact

This XSS vulnerability could lead to unauthorized script execution on websites, potentially enabling attackers to steal sensitive user data or manipulate content. Such breaches may violate GDPR by exposing personal data or HIPAA by compromising protected health information if exploited on relevant systems.

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Mitigation Strategies

Immediately update Breadcrumb NavXT to version 7.5.2 or later. If updating is not possible, apply the mitigation rule provided by Patchstack to block XSS attempts. Disable the plugin temporarily if no immediate fix is available. Review and sanitize user inputs to prevent script injection in breadcrumb-related fields.

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