SeaJS, Cross-site Scripting, CVE-2025-XXXX (Low)

How the Mentioned CVE Works:

The CVE-2025-XXXX vulnerability in SeaJS v2.2.3 is a Cross-site Scripting (XSS) issue that arises due to improper sanitization of user inputs within the SeaJS package. An attacker can exploit this vulnerability by injecting malicious JavaScript code into the application, which is then executed in the context of the victim’s browser. This can lead to unauthorized actions, data theft, or session hijacking. The vulnerability is classified as low severity due to the specific conditions required for exploitation, such as user interaction or specific browser configurations. The issue was identified and reported to the GitHub Advisory Database and the National Vulnerability Database on March 3, 2025.

DailyCVE Form:

Platform: SeaJS

Version: 2.2.3

Vulnerability: Cross-site Scripting (XSS)

Severity: Low

Date: March 3, 2025

What Undercode Say:

Exploitation:

1. Payload Injection: Inject malicious scripts via user inputs or URL parameters.

Example: ``

1. DOM Manipulation: Exploit DOM-based XSS by targeting SeaJS’s dynamic content loading.
2. Phishing: Use XSS to redirect users to malicious sites or steal session cookies.

Protection:

1. Input Sanitization: Use libraries like DOMPurify to sanitize user inputs.

Example: `const cleanInput = DOMPurify.sanitize(userInput);`

1. Content Security Policy (CSP): Implement CSP headers to restrict script execution.

Example: `Content-Security-Policy: default-src ‘self’;`

1. Update SeaJS: Upgrade to a patched version if available.
2. Escape Output: Always escape dynamic content before rendering.

Example: Use `encodeURIComponent()` for URLs.

Commands:

1. Check Version: `npm list seajs`

2. Install DOMPurify: `npm install dompurify`

1. Test CSP: Use browser developer tools to verify CSP headers.

URLs:

1. GitHub Advisory Database
2. National Vulnerability Database
3. DOMPurify Documentation

Code Examples:

1. Sanitization:

import DOMPurify from 'dompurify';
const userInput = "<script>alert('XSS')</script>";
const cleanInput = DOMPurify.sanitize(userInput);
document.getElementById('output').innerHTML = cleanInput;

2. CSP Header:

[http]
Content-Security-Policy: default-src ‘self’; script-src ‘self’ https://trusted.cdn.com;
[/http]

3. Escape Output:

const userInput = "<script>alert('XSS')</script>";
const safeOutput = encodeURIComponent(userInput);
console.log(safeOutput);

References:

Reported By: https://github.com/advisories/GHSA-pfr4-4397-3hg8
Extra Source Hub:
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