Man-in-the-Middle Injection

Man-in-the-Middle (MitM) Injection is a sophisticated Content Injection subtechnique within the Gain Access tactic where an attacker intercepts communication between two parties and actively injects malicious content without either party's knowledge. During this attack, the adversary positions themselves between a client and server, intercepting legitimate traffic and then modifying the data stream to introduce malicious payloads such as JavaScript, HTML, or even binary content. This technique exploits weaknesses in network security, unencrypted communications, flawed certificate validation, or compromised network infrastructure. Successful MitM injections can lead to session hijacking, credential theft, malicious redirects, or the execution of arbitrary code in the victim's browser context, ultimately granting the attacker unauthorized access to applications or systems. Unlike other Content Injection methods that target vulnerabilities in the application itself, MitM Injection operates at the network level, making it particularly dangerous for users on unsecured networks or when TLS/SSL implementations are improperly configured.