If you suspect that your Facebook account has been compromised, you need to change your password immediately. Then, if you use Facebook for logging into apps like Spotify or Instagram make sure you change the logins too. This will stop the hacker from gaining access to these services via your compromised Facebook account.
Hackers can find an abundance of personal information in hacked Facebook accounts. Hackers can use the information for malicious motives, like sending spam to people or sending fake credit card offers. They may also use the compromised account to send out spam messages to friends, or even publish on your timeline using your name (as as if you had done it yourself).
Hackers are most likely to gain access to accounts through exploiting a flaw in the Facebook application’s code. A flaw in the iOS Facebook application allows hackers to hijack cookies, and steal the “access token” of an iPhone user. These tokens are digital keys, grant them full control over the user’s Facebook Account, as well as any other websites they sign into with their Facebook credentials.
Hackers may also gain access to a user’s account through blog here brute force attacks. This method involves figuring out the password, usually the most commonly used ones, such as 123456789 and 1234567890. In addition, hackers could gain access to an account by scanning for compromised credentials. There are numerous free tools to check for stolen data, including the well-known website HaveIBeenPwned.