User Controllable HTML Element Attribute (Potential XSS)

• Risk:

• Informational

• Type:
• Passive

• CWE:
• CWE-20

Summary

This check looks at user-supplied input in query string parameters and POST data to identify where certain HTML attribute values might be controlled. This provides hot-spot detection for XSS (cross-site scripting) that will require further review by a security analyst to determine exploitability.

Solution

Validate all input and sanitize output it before writing to any HTML attributes.

Other info

User-controlled HTML attribute values were found. Try injecting special characters to see if XSS might be possible. The page at the following URL: http://example.com/i.php?name=fred appears to include user input in: a(n) [img] tag [alt] attribute The user input found was: name=fred The user-controlled value was: pscanrules.usercontrolledhtmlattributes.

References

https://cheatsheetseries.owasp.org/cheatsheets/Input_Validation_Cheat_Sheet.html

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