Cross-Site Scripting in Extensions for Leaflet Map

Executive Summary

This vulnerability is a Cross-site Scripting (XSS) issue found in the hupe13 Extensions for Leaflet Map. Specifically, it is a DOM-Based XSS caused by improper neutralization of input during web page generation. This means that malicious scripts can be injected and executed in the context of a user's browser when interacting with the affected Leaflet Map extension versions up to 5.1.

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Detection Guidance

Detecting this vulnerability involves checking if the affected WordPress plugin, Extensions for Leaflet Map, is installed and running a vulnerable version (5.1 or below).

• Check the installed version of the Extensions for Leaflet Map plugin in your WordPress dashboard under 'Plugins'.
• Use a WordPress security scanner like Patchstack, Wordfence, or WPScan to scan for known vulnerabilities in installed plugins.
• Manually inspect the plugin files for version information by navigating to the plugin directory: /wp-content/plugins/extensions-leaflet-map/ and checking the readme.txt or main plugin file for the version number.
• Monitor network traffic for suspicious activity, such as unexpected script injections or requests to malicious domains, which may indicate exploitation attempts.

No specific commands are provided in the context, but you can use the following general approach to check for vulnerable plugins:

• For WordPress CLI users, run: wp plugin list --fields=name,version to list all installed plugins and their versions.
• For manual checks, use: grep -r 'Version:' /var/www/html/wp-content/plugins/extensions-leaflet-map/ to find the version in the plugin files.

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Impact Analysis

The vulnerability can allow attackers to execute arbitrary scripts in the victim's browser, potentially leading to unauthorized actions such as stealing sensitive information, hijacking user sessions, or performing actions on behalf of the user without their consent. The CVSS score of 7.1 indicates a high severity with impacts on confidentiality, integrity, and availability.

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Compliance Impact

This vulnerability, a DOM-Based Cross-Site Scripting (XSS) issue, can impact compliance with standards and regulations like GDPR and HIPAA due to its potential to expose sensitive data or allow unauthorized actions on affected websites.

• GDPR: The vulnerability could lead to unauthorized access to user data or session hijacking, violating GDPR's requirements for data protection and confidentiality (Articles 5, 25, and 32). If exploited, it may result in unauthorized data disclosure, which must be reported under GDPR's breach notification rules (Article 33).
• HIPAA: For organizations handling protected health information (PHI), this vulnerability could compromise the integrity and confidentiality of PHI. HIPAA's Security Rule (45 CFR Part 164) mandates safeguards against such risks, and exploitation could lead to non-compliance and potential penalties.

The CVSS score of 7.1 indicates a moderate risk, but the impact on compliance depends on the nature of the data handled by the affected system. If the vulnerable plugin is used in a context involving personal or sensitive data, the risk of non-compliance increases.

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Mitigation Strategies

To mitigate this vulnerability, follow these immediate steps:

• Update the Extensions for Leaflet Map plugin to version 5.2 or later, as this version contains the fix for the XSS vulnerability.
• If updating is not immediately possible, apply the mitigation rule provided by Patchstack to block exploitation attempts until the update can be applied.
• Restrict access to the WordPress admin dashboard to trusted users only, reducing the risk of privileged users interacting with malicious links.
• Monitor your website for signs of compromise, such as unexpected script injections, redirects, or unauthorized changes to content.
• Consider using a web application firewall (WAF) to filter out malicious requests targeting this vulnerability.

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