The first thing you must do if you believe your Facebook account has been compromised is to change your password. Then, if you use Facebook to log into apps like Spotify or Instagram then change those logins as well. This will stop the hacker from accessing the third-party apps from your hacked Facebook profile.
Hackers can uncover a wealth of personal data in hacked Facebook accounts. Hackers could make use of this information for nefarious purposes, such as taking credit card numbers or spamming people with fake credit card offers or scams using phishing. They can also use the hacked account to send spam messages to friends, or put up a post on your Facebook timeline with your name (as as if you had done it yourself).
Hackers are most likely to gain access to an account by exploiting a flaw within the Facebook application code. For instance, a vulnerability in iOS’s Facebook app allowed hackers to hijack cookies and get the iPhone user’s “access token.” These tokens are digital keys that allow them complete control over the user’s Facebook account as well as through Single Sign-On, other websites that the user uses their Facebook credentials.
Hackers can also gain access to a user’s account by using brute force attacks. This technique involves guessing a password, often the most commonly used ones such as 123456789 or 1234567890. Hackers can also gain access to accounts through scanning compromised credentials. There are a variety of free tools to check for stolen data, including the well-known website HaveIBeenPwned.
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