A Recent Study from HyThech Technologies Found That Three of the Most

A recent study from HyThech Technologies found that three of the most popular websites are having most commonly exploitable flaw in their web applications. Using this vulnerability, an attacker may inject malicious code that can be executed on a user's machine. Also, the study revealed that most sensitive target of this vulnerability is stealing session cookies. This helps attackers to duplicate the user session and access anything the user can perform on a website like manipulating personal information, creating fake social media posts, stealing credit card information and performing unauthorized financial transactions, etc. Identify the vulnerability revealed by HyThech Technologies?

A) DoS vulnerability
B) Buffer overflow vulnerability
C) Insecure decentralization vulnerability
D) XSS vulnerability