{"id":52,"date":"2020-07-04T19:47:45","date_gmt":"2020-07-04T14:17:45","guid":{"rendered":"https:\/\/www.pethuraj.com\/blog\/?p=52"},"modified":"2021-06-14T21:36:58","modified_gmt":"2021-06-14T16:06:58","slug":"bbc-bug-bounty-write-up-xss-vulnerability","status":"publish","type":"post","link":"https:\/\/www.pethuraj.com\/blog\/bbc-bug-bounty-write-up-xss-vulnerability\/","title":{"rendered":"BBC Bug Bounty Write-up | XSS Vulnerability"},"content":{"rendered":"\n<p>This is a write-up about the XSS Vulnerability which I found on the BBC website.<\/p>\n\n\n\n<p>I came across BBC\u2019s Bug Bounty program and decided to give a try.<\/p>\n\n\n\n<p>I picked http:\/\/www.worldservicepartners.bbc.co.uk\/ as my target (domain unavailable, as BBC terminated the domain recently).<\/p>\n\n\n\n<p>On visiting the domain, there was a login page but there\u2019s no registration \/ signup feature to utilize the login form.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"481\" src=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/login-form-1024x481.png\" alt=\"\" class=\"wp-image-53\" srcset=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/login-form-1024x481.png 1024w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/login-form-300x141.png 300w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/login-form-768x360.png 768w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/login-form-1536x721.png 1536w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/login-form.png 1707w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>As there were no other input fields other than the login panel itself, I used some tools to find the parameters, but no luck. I couldn\u2019t find any input parameters.<\/p>\n\n\n\n<p>So I decided to play around with login form and tried SQLi and other input related vulnerabilities.<\/p>\n\n\n\n<p>On firing up the burp and intercepting the login request, I found a couple of hidden parameters alongside the username and password input field.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">username=123&amp;password=456&amp;dest=xgysk&amp;iframe=<\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"514\" src=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/burp-suite-intercept-login-form-1-1024x514.png\" alt=\"\" class=\"wp-image-54\" srcset=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/burp-suite-intercept-login-form-1-1024x514.png 1024w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/burp-suite-intercept-login-form-1-300x151.png 300w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/burp-suite-intercept-login-form-1-768x386.png 768w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/burp-suite-intercept-login-form-1.png 1521w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Notice the hidden parameter dest and iframe in the request. I tried possible attack vectors for SQLi, XSS and other input validation vulnerabilities.<\/p>\n\n\n\n<p>I noted that the traditional XSS payloads such as didn\u2019t trigger an XSS. So I used Javascript Event Handlers which perform an action based on certain events such as onmouseover, onmouseclick, etc.<\/p>\n\n\n\n<p>NOTE: Using of event handlers requires user interaction such as mouse click or key press.<\/p>\n\n\n\n<p>I understood that the browser is ignoring the javascript events such as onclick and onmouseover. So the execution of XSS is limited to access keys using the following payload.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>     \u201caccesskey=\u201dx\u201donclick=\u201dalert(document.domain)\u201d\/\/<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"593\" src=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/xss-payload-1024x593.png\" alt=\"\" class=\"wp-image-55\" srcset=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/xss-payload-1024x593.png 1024w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/xss-payload-300x174.png 300w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/xss-payload-768x445.png 768w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/xss-payload.png 1046w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Notice the parameter dest= containing the specially crafted XSS payload.<\/p>\n\n\n\n<p>When the request is made, the page loads normally. To trigger an XSS, we will need to use the following key combinations to get the Alert box.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>     (Press ALT+SHIFT+X on Windows) or (CTRL+ALT+X on OS X)<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"566\" src=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-xss-1024x566.png\" alt=\"\" class=\"wp-image-56\" srcset=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-xss-1024x566.png 1024w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-xss-300x166.png 300w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-xss-768x425.png 768w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-xss.png 1369w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>After reporting this issue to the BBC Security Team, I\u2019m honored on their Hall of Fame page and presented with a BBC T-Shirt.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"508\" src=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-hall-of-fame-1024x508.png\" alt=\"\" class=\"wp-image-57\" srcset=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-hall-of-fame-1024x508.png 1024w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-hall-of-fame-300x149.png 300w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-hall-of-fame-768x381.png 768w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-hall-of-fame-1536x762.png 1536w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-hall-of-fame.png 1759w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Here\u2019s the cool T-shirt from BBC \ud83d\udc55<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"596\" src=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-bug-bounty-1024x596.jpg\" alt=\"\" class=\"wp-image-58\" srcset=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-bug-bounty-1024x596.jpg 1024w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-bug-bounty-300x175.jpg 300w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-bug-bounty-768x447.jpg 768w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2020\/09\/bbc-bug-bounty.jpg 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Thanks for reading this article. Hope you liked it.<\/p>\n\n\n\n<p>To find all my Acknowledgements \/ Hall of Fames \/ Bug Bounty journey, Visit <a href=\"https:\/\/www.pethuraj.in\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.pethuraj.in<\/a><\/p>\n\n\n\n<p>Stay tuned for more writeups.<\/p>\n\n\n\n<p><strong>Get in touch with me \u2013<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/twitter.com\/Pethuraj\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/twitter.com\/Pethuraj<\/a><br><a href=\"https:\/\/www.linkedin.com\/in\/pethu\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.linkedin.com\/in\/pethu\/<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">You may like<\/h3>\n\n\n<div class=\"pt-cv-wrapper\"><div class=\"pt-cv-view pt-cv-grid pt-cv-colsys\" id=\"pt-cv-view-2afc15cbs4\"><div data-id=\"pt-cv-page-1\" class=\"pt-cv-page\" data-cvc=\"2\"><div class=\"col-md-6 col-sm-6 col-xs-12 pt-cv-content-item pt-cv-1-col\" ><div class='pt-cv-ifield'><a href=\"https:\/\/www.pethuraj.com\/blog\/how-to-use-burp-suite-like-a-pro-part-2\/\" class=\"_self pt-cv-href-thumbnail pt-cv-thumb-default\" target=\"_self\" ><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"150\" src=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2025\/01\/Use-Burp-Suite-like-a-PRO-Part-2-300x150.png\" class=\"pt-cv-thumbnail\" alt=\"\" srcset=\"https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2025\/01\/Use-Burp-Suite-like-a-PRO-Part-2-300x150.png 300w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2025\/01\/Use-Burp-Suite-like-a-PRO-Part-2-768x384.png 768w, https:\/\/www.pethuraj.com\/blog\/wp-content\/uploads\/2025\/01\/Use-Burp-Suite-like-a-PRO-Part-2.png 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\n<h4 class=\"pt-cv-title\"><a href=\"https:\/\/www.pethuraj.com\/blog\/how-to-use-burp-suite-like-a-pro-part-2\/\" class=\"_self\" target=\"_self\" >How to use Burp Suite Like a PRO? 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I came across BBC\u2019s Bug Bounty program and decided to<\/p>\n","protected":false},"author":1,"featured_media":59,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[3],"class_list":["post-52","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-xss","tag-xss"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>BBC Bug Bounty Write-up | XSS Vulnerability - Pethuraj&#039;s Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pethuraj.com\/blog\/bbc-bug-bounty-write-up-xss-vulnerability\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"BBC Bug Bounty Write-up | XSS Vulnerability - Pethuraj&#039;s Blog\" \/>\n<meta property=\"og:description\" content=\"This is a write-up about the XSS Vulnerability which I found on the BBC website. 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