Overview
CVE-2025-66093 identifies a DOM-Based Cross-Site Scripting (XSS) vulnerability found in the “Extensions for Leaflet Map” WordPress plugin. This vulnerability affects versions up to and including 4.8. Exploitation could allow attackers to inject malicious scripts into the affected web pages, potentially leading to account compromise, data theft, or other malicious activities.
Technical Details
The vulnerability lies in the improper neutralization of input during web page generation, specifically a DOM-Based XSS flaw. This means that the malicious script doesn’t need to be sent to the server to be executed. Instead, the vulnerability occurs entirely within the user’s browser. The plugin’s JavaScript code processes user-supplied data (likely from the URL or local storage) without proper sanitization before using it to dynamically update the page’s Document Object Model (DOM). An attacker can craft a malicious URL or manipulate local storage values to inject arbitrary JavaScript code into the user’s browser when they visit a page using the vulnerable Leaflet Map extension.
CVSS Analysis
Unfortunately, the CVSS score and severity are currently listed as N/A for CVE-2025-66093. This might be due to the vulnerability being newly discovered or undergoing further analysis. However, DOM-Based XSS vulnerabilities are generally considered to be of medium to high severity, depending on the scope of the attack and the potential impact on users.
Possible Impact
Successful exploitation of this DOM-Based XSS vulnerability could lead to several severe consequences:
- Account Compromise: An attacker could steal user cookies and session tokens, allowing them to impersonate legitimate users.
- Data Theft: Sensitive information displayed on the page, such as user details or financial data, could be extracted and sent to a remote server controlled by the attacker.
- Redirection to Malicious Sites: Users could be redirected to phishing websites or sites containing malware.
- Website Defacement: The appearance and functionality of the affected web pages could be altered, potentially damaging the website’s reputation.
- Keylogging: Injected JavaScript could record user keystrokes, capturing passwords and other sensitive information.
Mitigation or Patch Steps
The recommended mitigation steps are:
- Update the Plugin: The most effective solution is to update the “Extensions for Leaflet Map” WordPress plugin to a version that includes a fix for this vulnerability. Check the WordPress plugin repository or the plugin developer’s website for updates.
- If no update is available, consider temporarily disabling the plugin until a patched version is released. This will remove the vulnerable code from your website.
- Web Application Firewall (WAF): Implement a web application firewall (WAF) with rules to detect and block XSS attacks. Configure the WAF to sanitize user input and prevent the execution of malicious scripts.
- Input Sanitization: If you have access to the plugin’s code, ensure that all user input is properly sanitized before being used to update the DOM. Use appropriate encoding functions to escape special characters and prevent the execution of malicious scripts.
