(also MITM, MITM attack, adversary-in-the-middle, machine-in-the-middle, meddler-in-the-middle, person-in-the-middle)
A man-in-the-middle-attack (MITM) is a cyberattack where a hacker inserts themself into a conversation between two parties — the user and the entity the user is trying to communicate with. The malicious player becomes the “man in the middle” and may intercept communications to eavesdrop, impersonate, or steal sensitive information.