Clipboard text is the data a user temporarily copies for pasting elsewhere. It can hold plain text, passwords, API tokens, session identifiers, file paths, internal URLs, or other sensitive material. Because it is often copied in a hurry, it may be less protected than data stored in files or password managers.
In cyber security, clipboard text matters because malware can read it without needing to break encryption or steal a document directly. Attackers use clipboard capture to harvest secrets that users copy between tools, while defenders watch for suspicious access to clipboard APIs, endpoint alerts, or unusual PowerShell and script activity near user sessions. In practice, clipboard monitoring is often part of broader data theft, alongside screenshots and file collection, because it exposes whatever the user recently handled on screen.