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How I compromised Tinder account utilizing Facebook’s profile set and gained $6,250 in bounties

How I compromised Tinder account utilizing Facebook’s profile set and gained $6,250 in bounties

This could be getting circulated making use of consent of zynga in the responsible disclosure strategy.

The vulnerabilities talked about with this article happened to be blocked swiftly through engineering groups of facebook or twitter and Tinder.

This document is about a free account takeover vulnerability i ran across in Tinder’s application. By exploiting this, an assailant could have acquired entry to the victim’s Tinder profile, that should have employed her telephone number to visit.

This could possibly being used through a vulnerability in Facebook’s levels Kit, which facebook or twitter has tackled.

Both Tinder’s web and mobile purposes let users to use the company’s phone number to log into this service membership. This connect to the internet tool are provided by profile set (Twitter).

Login Solution Running On Facebook’s Accountkit on Tinder

An individual clicks about connect to the internet with Phone Number on tinder.com and then they are redirected to Accountkit.com for login. If your authentication is successful consequently Account set passes by the entry token to Tinder for go browsing.

Interestingly, the Tinder API was not inspecting the client identification from the token furnished by membership set.

This permitted the opponent to utilize virtually any app’s connection token furnished by Account system taking along the genuine Tinder account of different customers.

Susceptability Profile

Levels system happens to be something of facebook or myspace that permits consumers fast create and log in to some registered applications by using just their own telephone numbers or email address without the need for a password. It really is reliable, simplified, and provides you a decision about they would like to join applications.

Tinder happens to be a location-based mobile software for searching and fulfilling new people. You are able to users to like or dislike other individuals, following go on to a chat if both sides swiped best.

There’s a susceptability in profile system through which an opponent perhaps have gathered use of any user’s levels package membership by simply employing their phone number. After in, the opponent could have become ahold from the user’s membership package entry token contained in their unique cookies (aks).

Afterward, the opponent can use the entry token (aks) to log into the user’s Tinder profile using a prone API.

How simple exploit functioned step-by-step

Run #1

Initially the attacker would sign in victim’s membership Kit account by entering the victim’s contact number in “new_phone_number” in API consult shown below.

Please note that profile set had not been verifying the mapping https://hookupdates.net/pl/randki-dla-graczy/ from the cell phone numbers their onetime password. The attacker could type in anyone’s telephone number and basically log into the victim’s Account equipment account.

Then your assailant could replicate the victim’s “aks” gain access to keepsake of membership package app from cookies.

The vulnerable Profile System API:

Step no. 2

Right now the assailant only replays in this article consult utilizing the duplicated entry token “aks” of target into Tinder API below.

They are going to recorded to the victim’s Tinder account. The attacker would after that basically has complete power over the victim’s profile. They were able to study private chats, complete personal data, and swipe additional user’s pages kept or right, among other things.

Prone Tinder API:

Video Proof Principle


The weaknesses were addressed by Tinder and zynga immediately. Facebook or myspace recognized me with US $5,000, and Tinder granted me personally with $1,250.

I’m the president of AppSecure, a specific cyber protection team with numerous years of expertise acquired and precise resources. Our company is right here to guard your small business and essential records from on the internet and offline hazards or vulnerabilities.

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