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Business Logic Vulnerabilities Series: Hot Fixes Getting Cold, A journey of 7 Versions/Years of a sole Facebook vulnerability!

Hi Folks, This is the third part of A brief on Abusing Invitation Systems blog post, In case you have missed the previous parts of this story of write-ups, it is advised to have a sneak peak at the First Second part before you go on with this post. So before we kick off to […]

Business Logic Vulnerabilities Series: A Story of a 4-Years-old (and counting) Facebook Security Bug!

Hi Guys, I am Ali Kabeel an Application Security Intern at Seekurity team. This is Second part of A brief on Abusing Invitation Systems blog post . In this blog post I will be mainly focusing on how I was able “by following the tips and tricks in the previous blog post” to bypass Facebook […]

Hijacking User's Private Information access_token from Microsoft Office360 facebook App

Hi Guys, Today i would like to show you how a single misconfiguration issue would jeopardize the user’s privacy if maliciously exploited hence hijack user “access_token” from Microsoft Office360 facebook App. Microsoft decided that this Office365 facebook app is NOT under their Microsoft Online Services bug bounty scope although we proved that our discovered bug can result in […]

The 2.5mins or 2.5k$ hawk-eye bug - A Facebook Pages Admins Disclosure Vulnerability!

Hi Guys, How are you doing? Well i’ll consider and hope the answer is “Fine”… Today i will show you a bug i found in Facebook without even using any kind of testing tools BUT those kind of bugs requires what’s more than tools, it requires a hawk-eye, A platform-aware bug hunter mentality, a poet and […]

The Fuzz...The Bug..The Action - A Race Condition bug in Facebook Chat Groups leads to spy on conversations!

Hi Folks, Long time no see, it’s Seif Elsallamy, Remember me ? if not 🙁 you may go through my previous blogs Stored XSS in the heart of the Russian email provider giant (Mail.ru)  ,  Rolling around and Bypassing Facebook’s Linkshim protection on iOS Today I’m gonna show you a race condition bug which i recently fall […]

Rolling around and Bypassing Facebook's Linkshim protection on iOS

Supp!, How are you guys! I hope you’re fine, I’m Seif Elsallamy (again) if you don’t remember me read my previous blog here: Stored XSS in the heart of the Russian email provider giant (Mail.ru) Before we go in depth, lets know What is Linkshim ?

Let's steal some tokens!

Hey There, How you doing? Good? Cool! In this blog post I will be talking about my experience with minor bugs chained together to steal sensitive tokens. #1. Stealing CSRF tokens through Google Analytics. While randomly testing things on apps.shopify.com, I landed at some random app page and hit the Write a review button, I […]

Facebook Vulnerability - a “Cute Bug” that reveals the “likes” of deleted posts regardless of their privacy settings

Hi Folks, My name is Mohamed Abdel Aty, an Egyptian Web Developer & Bug Hunter, Today I would like to share with you a “cute” bug I found while doing some bug hunting in Facebook. Testing different sub-domains is a common procedure in bug hunting , while searching the domain “mbasic.facebook.com” I noticed this link

Facebook movies recommendation vulnerability - A bug capable of erasing all your important notifications!

Hi Folks, Facebook is the largest social network ever known on the internet, People are using Facebook for contacting friends, Family and sometimes for Work! When it comes to Work that means an important notifications from your company’s page, work account, work admins, business accounts, etc…

Facebook ClickJacking - How we put a new dress on Facebook UI

Hi Bug Hunters, Today we will explain how we redressed facebook ui and made it so easy to fool a victim to for example, Add the attacker as a member in one of his own secret groups on facebook. Here’s some details about the issue:

Facebook API 2.x Bypassed!

This is the write up of my last Facebook Report, How I was able to bypass the permissions approvals system in the 2.x Facebook API Versions in 2 different ways. FIRST Flow : +++Flow discussion:

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