QID 153000

Date Published: 2023-07-14

QID 153000: Ruby on Rails - Reflected Cross-Site-Scripting (XSS) Vulnerability

XSS vulnerabilities occur when the Web application echoes user-supplied data in an HTML response sent to the Web browser. For example, a Web application might include the user's name as part of a welcome message or display a home address when confirming a shipping destination. If the user-supplied data contain characters that are interpreted as part of an HTML element instead of literal text, then an attacker can modify the HTML that is received by the victim's Web browser.

The XSS payload is echoed in HTML document returned by the request. An XSS payload may consist of HTML, JavaScript or other content that will be rendered by the browser. In order to exploit this vulnerability, a malicious user would need to trick a victim into visiting the URL with the XSS payload.

Successful exploitation could allow an attacker to execute arbitrary JavaScript code in the context of the interface or allow the attacker to access sensitive, browser-based information.

CVSS V3 rated as High - 6.1 severity.

CVSS V2 rated as Medium - 5 severity.

Solution

Filter all data collected from the client including user-supplied content and browser content such as Referrer and User-Agent headers.

Any data collected from the client and displayed in a Web page should be HTML-encoded to ensure the content is rendered as text instead of an HTML element or JavaScript.

Vendor References

CVEs related to QID 153000

Software Advisories

Advisory ID	Software	Component	Link

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