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Questions tagged [reflected-xss]

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XSS - Anyway to bypass double quotes in href of anchor?

I have an anchor that has href attribute populated by my input. I am trying to input javascript, but it always renders it useless since it always appears between double quotes. So far, I have tried ...
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21 views

Explotation of reload/redirect through javascript

While working on a site (https://website.com/site/site.apexp) the site redirects through a javascript function: <html> <script> function redirectOnLoad() { var escapedHash = ''; ...
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setAttributeNS XSS Vulnerability

Im fixing some security issues that AppScan found on my Angular Application, one of them is the insecure use of "setAttributeNS()" I use this method in my application to inject some ...
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1 answer
87 views

How do I test for Reflected XSS in webpage titles, url parameters and javascript variables?

I have a java web app. I'm using OWASP Java Encoder to encode for html, javascript and url components to mitigate reflected XSS. I'm new to this so I'm not sure on how to test on my web app for the ...
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2 votes
1 answer
1k views

Is <plaintext> vulnerable to XSS

I have a question regarding the element. I know that this element has been deprecated for a long time, but during a penetration test, we inserted the following attack vector into a textarea: <...
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Prevent XXS through file using WAF?

I encounter a scenario which the attacker create a .jpg file containing javascript code and after uploading, the script will be executed on the browser while the .jpg file is displaying. I configured ...
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2 answers
2k views

read etc/passwd using XSS

by trying the XSS room on THM, I try was trying to read the /etc/passwd using the following cmd: <iframe src="/etc/passwd"></iframe> However what I got is an error code as shown ...
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3 answers
110 views

Unclear security impact of a Reflected XSS vulnerability

What is the security impact of a Reflected XSS vulnerability on a state website involved in financial relations? There are no user profiles on this page and it serves as an information board and a ...
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182 views

XSS attack being blocked by the browser

I'm trying to validate / test and XSS attack; however when I navigate to the page, the browser (tried on Chrome and Edge) tells me: A parser-blocking, cross site (i.e. different eTLD+1) script, is ...
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2 votes
2 answers
940 views

Does escaping quotes in a HTML attribute context prevent XSS?

I'm learning about XSS and I found I can inject code in this tag a few days ago. Tag: <div id="pagenotfound" title='Cannot find /it/search/testtesttesttetst\'onload=alert(1)'> My ...
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1 vote
1 answer
154 views

Blocking reflected XSS on common web servers

How is it possible to block reflected XSS on common web servers, such as IIS, Apache HTTP Server and Nginx? The Content-Security-Policy: reflected-xss filter doesn't work on latest Chrome and X-XSS-...
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2 votes
2 answers
239 views

Further exploit self XSS

I´m pentesting a clients website and found a self XSS Vulnerability in the Login Page: in case of a login error the Error Page shows the Username, so if you input <script>alert("XSS")&...
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3 votes
1 answer
531 views

Is an XSS via Cross-Site File Upload (CSFU) practically exploitable?

I came across a very interesting case: The user uploads a file The file contains <script>alert(2)</script> The web app shows the file's content to the user -> the XSS payload is ...
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2 answers
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can i execute javascript in href when i have text before my input?

This is where I took this example from: <a href="<?php echo $_GET['e'];?>">Back</a> In this code, I can do http://my_url?e=javascript:alert() But what can I do if my code ...
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1 vote
0 answers
664 views

XSS with Template Literals

I suspect I have a potential XSS vulnerability at a client-side level, however, I'm not able to exploit it successfully. The URL I'm using consists of three parameters that reflect back to the user ...
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1 answer
523 views

It's possible to trigger a XSS in url context without this following caracter ' : '?

I try to bypass a XSS filter to trigger a XSS in url context. But the problem this following char is blacklist ' :' The site allow the user to use some basic html balise like h1, h2, h3, p, a, u, etc ...
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1 vote
1 answer
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Reflected XSS monitoring

There is a lot of information on how to avoid or detect XSS, but I couldn't find much information on how to monitor for reflected XSS. Is there a way to automatically detect reflected XSS in my ...
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3 votes
0 answers
338 views

Preventing open redirects / xss on a variable return url / iframe

Let's assume I have a website where I have to either redirect the user to another URL or include another URL in an iframe, that is given by a GET parameter. I cannot use HMAC when the URL is created. ...
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URL Encoding leading to invalid flag

I'm currently completing an XSS challenge in a CTF. I successfully redirect the admin cookie to my request bin, but the flag is said to be invalid. I am told this is because the flag string gets ...
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1 answer
1k views

Reflected XSS in form action - understanding

I am trying to learn basics of web security vulnerabilities. I have found a website, where on reset password, you get a link in the email with a token, and when you click this link, the webpage opens ...
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0 votes
1 answer
119 views

How to come out of href attribute using xss?

I was learning about XSS and found a website that takes my input say PAYLOAD and converts it to <a href = "example.com/search/PAYLOAD" > Link </a> After hit and trial, I found that it ...
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914 views

XSS Bruteforcing results in 500 internal server error

I've been trying to trigger xss in a website with the following url https://website.com/login/error?username_or_email=xyz%40gmai.com&redirect_after_login=%2wall While trying different payloads ...
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5 votes
3 answers
272 views

Is non-executed content still considered XSS?

I'm working through an OWASP Zap report that has flagged several URLs on the domain as being vulnerable to XSS, but the vulnerability is never output in a context that is executable by the browser. ...
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How to bypass filter which blocks < charachter? [duplicate]

I am practicing reflected xss .I found a page in my lab which gives back the input in response of the request.But the application is sanitizing anything which comes after a < character because of ...
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1 vote
1 answer
2k views

How to bypass sanitization of < while exploiting an XSS vulnerability?

Whatever is to the right of < is being deleted if I don't have a following >, else everything in between < and > is being deleted. Is there a way to bypass this sanitization?
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4 votes
3 answers
1k views

Reflected XSS in a JavaScript URL with some characters blocked

I am new to the field of Web Security and am practising labs from Portswigger Web Security Academy. In this lab, we have to call the alert function with 1337 as the parameter. The solution given on ...
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Bypass XSS in script tag

<script type="text/javascript"> window.RPM = {"debug":false,"env":"user input"} </script> user input can be inputted with xss payload. Filter is doing following replaces: i) " with \" ...
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1 vote
1 answer
3k views

Demonstrating reflected XSS with GET Parameter and URL encoding

A client is developing a website which is vulnerable to reflected XSS through a GET parameter: https://example.com/vulnerable-url?")||true)alert("XSS");</script> I would like to demonstrate ...
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1 answer
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Question about XSS

I'm new to penetration testing and I found a Reflected XSS vulnerability on the website I'm working on. But the thing is when I submit the form the website automatically redirect me to www.website....
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-1 votes
2 answers
1k views

"Reflected XSS"-like attack on chatbot AI

This is a theoretical question. I just watched a certain video in which the author apparently unmasks a chatbot AI that is likely trying to harvest data and spread influence in a cult-like manner on a ...
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6 votes
1 answer
1k views

What was the real reason for dropping reflected-xss directive from CSP?

There were two response headers which could be set by servers to instruct browsers to enable heuristics based reflected XSS detection and prevention in the past. X-XSS Protection: 1; mode=block ...
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1 answer
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can you have reflective xss through a POST parameter?

While testing a dummy app, I noticed that the XSS done through POST parameters was getting stored in the form (the alert('XSS') would show every time I loaded the page where I had injected the payload)...
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how to bypass URL encoding on XSS [duplicate]

I typed following script on the search input on the website alert() but website converted this script into &lt;script&gt;alert()&lt;/script&gt; in HTML content, is there any possible ...
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2 answers
181 views

Is acquiring the csrftoken alone sufficient for performing any security exploits?

I have confirmed the presence of reflected XSS vulnerability in my website and I see the csrftoken present in one of the cookies when injecting a document.cookie in javascript. We don't have the user-...
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3 votes
0 answers
153 views

Is it possible to exploit this cors?

I found an xss on subdomain.example.com and i verified that the domain api.example.com accepts subdomain.example.com as valid origin. Can i exploit this as cors by inserting a CORS script in subdomain....
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1 answer
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Bypassing htmlspecialchars() for XSS (Reflected) and using an event handler is not an option in this case

I am trying to bypass high security XSS on DVWA. So the vulnerable code(I highly doubt that is it really vulnerable?) is:- <?php if(!array_key_exists ("name", $_GET) || $_GET['name'] == NULL || $...
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Finding hidden parameters manually for XSS

I am researching about XSS and Google helped me a lot about learning like how to bypass XSS filters, POST and GET based XSS . I am really curious to know how to find hidden parameters manually for ...
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1 answer
546 views

XSS triggered but chrome didn't show popup. What exactly was going on?

Related to my previous question on XSS in canonical link. At the beginning I turned off Chrome's XSS auditor and tried executing XSS with just onload event using following payload which did not ...
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1 answer
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Reflected XSS which only displays in the input [closed]

I am trying to execute an XSS in an HTTP GET request,but it just displays the input without running the script. I checked in BurpSuite and I see it added my input to referer: url and then my input. ...
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XSS vulnerability in display message

I have a webpage in which Email is given as input. It will then display "your email is abc@xyz.com". I am then changing the email in URL to <script>alert(1)</script> and send tbe request ...
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1 vote
0 answers
249 views

CSS Injection without colon

I'm looking for a way to create a CSS injection proof-of-concept. I can insert the following and it gets reflected in the browser: <style>body{background-color:red}</style> The only ...
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1 vote
2 answers
4k views

What are the common features to identify XSS attack from Apache log file?

I have tried some XSS vulnerability on web application such as webgoat, OWASP mutillidae, bWAPP. I want to know the features/keywords/footprints of cross site scripting attack in apache log file and ...
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1 answer
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Exploit: Send cookie to another server from url

I'm testing a web application and found that url contains "redirect=" where it navigates to new location once logged in. http://IPAddress/?redirect_uri=test I'm trying to exploit the cookie using ...
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0 votes
1 answer
544 views

Reflected XSS in multiline script block

I am trying to exploit a reflected cross site scripting in a GET request where the reflection is in the first multi line script block. It seems I can use every character but <, > and " and the ...
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0 votes
1 answer
4k views

How does OWASP ZAP find Reflected XSS?

What I'm doing: I'm using OWASP Zap to find vulnerabilities in a site (I have the owner's consent) and Zap came up with a Reflected XSS Vulnerability after I did an active scan on a POST request. It ...
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4 votes
1 answer
446 views

Why the following XSS vectors work without closing bracket?

The following XSS injections will execute without the accompanying closing tag (see this demo): <body/onload=alert(1) <svg/onload=alert(1) <iframe/onload=alert(1) I just need to know why ...
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2 votes
1 answer
895 views

Are unescaped backslashes dangerous in terms of XSS?

I thought the \ (backslash) character was a dangerous character that you needed to filter out/properly encode to protect against XSS attacks (OWASP says so, too), and I still do, but why? I found a ...
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1 vote
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3k views

How can I steal all cookies from reflected XSS?

I just found a website with a XSS vulnerability. When I visit the following URL, a pop up occurs: https://example.com/article/HALLOWEEN"><script>alert(1);</script> I have a ...
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5 votes
3 answers
1k views

Is this code vulnerable to Reflected XSS?

I'm doing a pentest and came by this code: (function() { var subdomain = (function() { var query = /[?&]css=([^&#]*)/i.exec(window.location.search); if(...
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0 votes
2 answers
327 views

XSS vulnerability through burp suite

I am getting a XSS vulnerability through burp suite but when I inject script manually I don't get the XSS vulnerability. Is this a reportable vulnerability?
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