When a Joomla website gets compromised, several things can happen, depending on the type of hack and the intention of the hacker. The compromised website can be filled with malicious scripts, has all its content removed, or being redirected to another website with malicious content.

Joomla websites can be compromised due to a variety of reasons, such as:

If the administrator's password is weak, it can be easily guessed or cracked by hackers using automated tools.

If the Joomla software or any of its extensions/plugins are not updated regularly, it can leave vulnerabilities in the website that hackers can exploit.

It is important to note that failing to update Joomla regularly can lead to compatibility issues, site downtime, security vulnerabilities, and other problems that can impact the website's functionality and reputation. Therefore, it is recommended to always keep Joomla and its extensions/plugins up-to-date, and to regularly back up the website to ensure business continuity and data recovery in the event of an issue.

When directories have execute permissions set for public users, it allows anyone to run code within that directory. This can be exploited by attackers to run malicious scripts or upload malicious files onto the website.

If the website code is not secure, it can be exploited by hackers using various techniques such as SQL injection, cross-site scripting, or file inclusion attacks.

Attackers can trick website administrators or users into revealing their login credentials or other sensitive information through phishing or other social engineering techniques.