Client-side scripts are used extensively by modern web applications. They perform from simple functions (such as the formatting of text) up to full manipulation of client-side data and Operating System interaction.

Cross Site Scripting (XSS) allows clients to inject scripts into a request and have the server return the script to the client in the response. This occurs because the application is taking untrusted data (in this example, from the client) and reusing it without performing any validation or sanitisation.

If the injected script is returned immediately this is known as reflected XSS. If the injected script is stored by the server and returned to any client visiting the affected page, then this is known as persistent XSS (also stored XSS).

Scanner has discovered that it is possible to insert script content directly into HTML element content.

A Cross Site Script Inclusion (XSSI) is the inclusion of a remote page. This vulnerability allows, among other things, to bypass the Same-Origin Policy mechanism of the browser. By forcing a victim to navigate to a malicious site, rather than making a direct request with JavaScript to the desired site which would then be blocked by the SoP, it is possible to include the remote script in the page. With a too lax configuration of the cookies, these will be integrated during the call and if it is an authenticated script containing sensitive information, the attacker will then have access to it.

The .NET framework allows to use the direct ResolveURL in order to load static contents from the application root (root relative) and not to worry about relative or absolute paths. However, this directive can be abused to inject arbitrary content in the URL which will then be reflected in a HTML tags of the different resources using ResolveUrl in the page. The exploitation of this vulnerability allows to obtain an injection of arbitrary javascript code (Cross-Site Scripting).

Client-side scripts are used extensively by modern web applications. They perform from simple functions (such as the formatting of text) up to full manipulation of client-side data and Operating System interaction. Cross Site Scripting (XSS) allows clients to inject scripts into a request and have the server return the script to the client in the response. This occurs because the application is taking untrusted data (in this example, from the client) and reusing it without performing any validation or sanitisation. If the injected script is returned immediately this is known as reflected XSS. If the injected script is stored by the server and returned to any client visiting the affected page, then this is known as persistent XSS (also stored XSS). Scanner has discovered that it is possible to inject an arbitrary url in the src attribute of a script tag. For example `<script src="https://INJECTION_HERE/">`, where `INJECTION_HERE` represents the location where the scanner payload was detected.

Client-side scripts are used extensively by modern web applications. They perform from simple functions (such as the formatting of text) up to full manipulation of client-side data and Operating System interaction.

Unlike traditional Cross-Site Scripting (XSS), where the client is able to inject scripts into a request and have the server return the script to the client, DOM XSS does not require that a request be sent to the server and may be abused entirely within the loaded page.

This occurs when elements of the DOM (known as the sources) are able to be manipulated to contain untrusted data, which the client-side scripts (known as the sinks) use or execute an unsafe way.

Scanner has discovered that by modifying the affected DOM source, it is possible to insert and execute JavaScript code.

Client-side scripts are used extensively by modern web applications. They perform from simple functions (such as the formatting of text) up to full manipulation of client-side data and Operating System interaction.

Unlike traditional Cross-Site Scripting (XSS), where the client is able to inject scripts into a request and have the server return the script to the client, DOM XSS does not require that a request be sent to the server and may be abused entirely within the loaded page.

This occurs when elements of the DOM (known as the sources) are able to be manipulated to contain untrusted data, which the client-side scripts (known as the sinks) use or execute an unsafe way.

Scanner has discovered that by inserting an HTML element into the page's DOM inputs (sources), it was possible to then have the HTML element rendered as part of the page by the sink.

Client-side scripts are used extensively by modern web applications. They perform from simple functions (such as the formatting of text) up to full manipulation of client-side data and Operating System interaction.

Cross Site Scripting (XSS) allows clients to inject scripts into a request and have the server return the script to the client in the response. This occurs because the application is taking untrusted data (in this example, from the client) and reusing it without performing any validation or sanitisation.

If the injected script is returned immediately this is known as reflected XSS. If the injected script is stored by the server and returned to any client visiting the affected page, then this is known as persistent XSS (also stored XSS).

Scanner has discovered that it is possible to insert script content directly into an HTML event attribute. For example `<div onmouseover="x=INJECTION_HERE"</div>`, where `INJECTION_HERE` represents the location where the scanner payload was detected.

Client-side scripts are used extensively by modern web applications. They perform from simple functions (such as the formatting of text) up to full manipulation of client-side data and Operating System interaction.

Cross Site Scripting (XSS) allows clients to inject scripts into a request and have the server return the script to the client in the response. This occurs because the application is taking untrusted data (in this example, from the client) and reusing it without performing any validation or sanitisation.

If the injected script is returned immediately this is known as reflected XSS. If the injected script is stored by the server and returned to any client visiting the affected page, then this is known as persistent XSS (also stored XSS).

Scanner has discovered that it is possible to insert script content directly into the requested PATH and have it returned in the server's response. For example `HTTP://yoursite.com/INJECTION_HERE/`, where `INJECTION_HERE` represents the location where the scanner payload was injected.

Client-side scripts are used extensively by modern web applications. They perform from simple functions (such as the formatting of text) up to full manipulation of client-side data and Operating System interaction.

Cross Site Scripting (XSS) allows clients to inject scripts into a request and have the server return the script to the client in the response. This occurs because the application is taking untrusted data (in this example, from the client) and reusing it without performing any validation or sanitisation.

If the injected script is returned immediately this is known as reflected XSS. If the injected script is stored by the server and returned to any client visiting the affected page, then this is known as persistent XSS (also stored XSS).

Scanner has discovered that it is possible to force the page to execute custom JavaScript code.

Client-side scripts are used extensively by modern web applications. They perform from simple functions (such as the formatting of text) up to full manipulation of client-side data and Operating System interaction.

Cross Site Scripting (XSS) allows clients to inject scripts into a request and have the server return the script to the client in the response. This occurs because the application is taking untrusted data (in this example, from the client) and reusing it without performing any validation or sanitisation.

If the injected script is returned immediately this is known as reflected XSS. If the injected script is stored by the server and returned to any client visiting the affected page, then this is known as persistent XSS (also stored XSS).

Scanner has discovered that it is possible to insert content directly into an HTML tag. For example `<INJECTION_HERE href=.......etc>` where `INJECTION_HERE` represents the location where the scanner payload was detected.

ID	Name	Severity
113250	Stored Cross-Site Scripting (XSS)	medium
113016	Cross-Site Script Inclusion (XSSI)	medium
112767	Cross-Site Scripting (XSS) in .NET Framework	medium
98740	Cross-Site Scripting (XSS) in script src	medium
98110	DOM-based Cross-Site Scripting (XSS) in attribute context	medium
98109	DOM-based Cross-Site Scripting (XSS)	medium
98108	Cross-Site Scripting (XSS) in event tag of HTML element	medium
98107	Cross-Site Scripting (XSS) in path	medium
98106	Cross-Site Scripting (XSS) in attribute context	medium
98105	Cross-Site Scripting (XSS) in HTML tag	medium
98104	Cross-Site Scripting (XSS)	medium

Detections

Analytics

Cross Site Scripting Family for Web App Scanning

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