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Hello Hunters,
As you all know, XSS is one of the most common web vulnerabilities, often underestimated but capable of causing severe security breaches. In this article, we will explore a real-world case where a DOM XSS vulnerability was not just identified but also escalated to steal authentication tokens and session IDs — ultimately leading to account takeover. This demonstrates the real impact of XSS beyond simple alert pop-ups and highlights the risks organizations face when failing to properly handle user-controlled data in the DOM.
Vulnerable Endpoint & Parameter
The vulnerable parameter is being used in the JavaScript, but it allows us to inject JavaScript without the need of injecting any tags.
https://example.com/preview/001981ba?articleId=<malicious payload>
The parameter articleId was improperly handled in client-side JavaScript, allowing an attacker to inject a script that executed directly within the victim’s browser DOM.