A remote attacker can exploit this vulnerability to execute arbitrary script code in the user’s browser session in the context of the affected site. This may lead to the disclosure of sensitive information or the installation of destructive software on the affected system. In addition, due to the nature of XSS, this issue may be exploited by political or corporate hackers to conduct phishing or click fraud attacks on the affected site, or to collect user information.
The following example shows how XSS vulnerability may be exploited to conduct click fraud attacks.
img src=” onerror=’this.src=’+’+this.location.href+’”>
In order to exploit the XSS vulnerability, an attacker must entice a user to click on a malicious link.
It is recommended that XSS filters are enabled to mitigate the risk of an attacker exploiting this issue. In addition, it is recommended that the id parameter be validated carefully on input to avoid XSS attacks.
Mitigation Strategies for XSS
The following mitigation strategies were created to help prevent XSS attacks on the affected site.
1. Filter out HTML content in input fields: If the input field is marked as containing HTML, the filter can block the malicious code from running in that form field.
2. Validate the id parameter carefully: The id parameter should be validated carefully on input to avoid causing an XSS attack.
Timeline
Published on: 11/09/2022 14:15:00 UTC
Last modified on: 11/10/2022 15:17:00 UTC