The most common source for DOM XSS is the URL, which is typically accessed with the window.location object. An attacker can construct a link to send a victim to a vulnerable page with a payload in the query string and fragment portions of the URL.

DOM Based XSS (or as it is called in some texts, “type-0 XSS”) is an XSS attack wherein the attack payload is executed as a result of modifying the DOM “environment” in the victim’s browser used by the original client side script, so that the client side code runs in an “unexpected” manner.

This can happen, for example, when a user input is used to update the page's HTML or JavaScript code in some way. In a DOM-based XSS attack, the malicious code is not sent to the server, but is instead executed directly in the user's browser.

November 11, 2025 - On line 10, we can see that the vulnerable application reads data from the firstName query parameter and passes it to the DOM sink, specifically innerHTML. Since we fully control the firstName query parameter, we can essentially pass the following payload as its value and render any HTML tag, including XSS payloads:

Unlike other cross-site scripting vulnerabilities, you cannot mitigate DOM-based XSS using a web application firewall (WAF) or generic framework protection like request validation in ASP.NET. Such mechanisms are completely useless against DOM-based XSS attacks because the payload never reaches the server.

July 18, 2022 - Document Object Model (DOM) cross-site ... or stored XSS, where the vulnerability is caused by server-side flaws and the payload is reflected in the response, ......

January 20, 2024 - But it’s still not a valid payload.

The consequences of DOM-based XSS flaws are as wide ranging as those seen in more well known forms of XSS, including cookie retrieval, further malicious script injection, etc., and should therefore be treated with the same severity. Identify DOM sinks. Build payloads that pertain to every sink type.

February 11, 2025 - When this HTML code is added to the DOM, it will directly trigger our XSS payload and execute the JavaScript code: alert(1) .

August 10, 2025 - DOM-based XSS, also known as Type-0 XSS, is an XSS attack in which the attack payload is executed by altering the DOM in the victim’s browser. This causes the client to run code, without the user’s knowledge or consent. The page itself (i.e.

##Description & PoC The "connected successfully" message is printed out without any output sanitation: {F271357} This is how it's being printed(this code snippet is taken from mycrypto-master.js, line 4072): {F271359} An attacker can simply put his payload at the link and it'll be embedded ...

That is, the page itself (the HTTP response that is) does not change, but the client side code contained in the page executes differently due to the malicious modifications that have occurred in the DOM environment. This is in contrast to other XSS attacks (stored or reflected), wherein the attack payload is placed in the response page (due to a server side flaw).

This repository is a comprehensive collection of Cross-Site Scripting (XSS) Payloads designed for educational, research, and testing purposes. It includes payloads for various XSS attack types such as Reflected XSS, Stored XSS, DOM-Based XSS, and WAF Bypass Techniques. - yogsec/XSS-Payloads

April 15, 2025 - User interaction: The attacker tricks a user into clicking a malicious link that contains an injected payload in the query string or fragment identifier. JavaScript processing: The web application’s client-side script extracts data from an attacker-controlled source and writes it into the DOM.

February 19, 2025 - If the data is incorrectly handled, an attacker can inject a payload, which will be stored as part of the DOM and executed when the data is read back from the DOM. A DOM-based XSS attack is often a client-side attack and the malicious payload ...

March 25, 2020 - Some libraries already generate Trusted Types that you can pass to the sink functions. For example, you can use DOMPurify to sanitize an HTML snippet, removing XSS payloads.

June 2, 2025 - These payloads demonstrate how XSS can break trust boundaries when user content is rendered without filters — especially if that content gets embedded in emails, alerts, or shared content.

If the un-sanitized field is stored server-side (e.g., bug report “details”), the payload becomes stored DOM XSS for any privileged viewer of the list.

June 18, 2025 - DOM-based XSS executes the payload entirely in the browser without involving the server response.

April 19, 2024 - 4) Here you can see that our query is directly gets appended to the document.write function (sink) without any sanitization, and this function writes data out to the page because of this our payload gets triggered. ... If a Javascript library such as jQuery is being used, you can lookout for sinks as ${}(selector function) which you can use to inject malicious objects into the DOM. JQuery used to be extremely popular, and a classic DOM XSS vulnerability was caused by websites using this selector in conjunction with the location.hash source for animations or auto-scrolling to a particular element on the page.