LOW: No Content-Security-Policy (CSP) headers — no XSS protection #9

New issue

Closed

opened 2026-05-09 05:11:46 +00:00 by Mark · 0 comments

Mark commented

2026-05-09 05:11:46 +00:00

Owner

Severity: LOW

Location

tokengenerator.html, entire file (no CSP meta tag or headers)

Description

The application runs entirely in the browser with no Content-Security-Policy (CSP) set. This means:

No script-src restrictions: If an XSS vulnerability exists elsewhere, an attacker can execute arbitrary JavaScript.
Data URI execution: The AI-generated icon images are loaded via data:image/png;base64,... URIs. While currently safe, an attacker who compromises the API response could inject malicious content.
No style-src restrictions: External CSS could potentially be manipulated.

Recommended Fix

Add a CSP meta tag in the <head> section:

<meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'; style-src 'self' https://fonts.googleapis.com 'unsafe-inline'; font-src https://fonts.gstatic.com; img-src 'self' data:;">

Impact

Low-severity on its own, but removing defenses-in-depth makes the app more vulnerable if other security issues are present.

## Severity: LOW ## Location `tokengenerator.html`, entire file (no CSP meta tag or headers) ## Description The application runs entirely in the browser with no Content-Security-Policy (CSP) set. This means: 1. **No script-src restrictions**: If an XSS vulnerability exists elsewhere, an attacker can execute arbitrary JavaScript. 2. **Data URI execution**: The AI-generated icon images are loaded via `data:image/png;base64,...` URIs. While currently safe, an attacker who compromises the API response could inject malicious content. 3. **No style-src restrictions**: External CSS could potentially be manipulated. ### Recommended Fix Add a CSP meta tag in the `<head>` section: ```html <meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'; style-src 'self' https://fonts.googleapis.com 'unsafe-inline'; font-src https://fonts.gstatic.com; img-src 'self' data:;"> ``` ### Impact Low-severity on its own, but removing defenses-in-depth makes the app more vulnerable if other security issues are present.