X.com Silently Injects Session-Bound Tracking Tokens into Clipboard Content

X.com silently injects session-bound tracking tokens into your clipboard on every copy — security tools correctly flag this as malicious injection. The platform intercepts copy events via JavaScript and modifies clipboard content with three tracking methods: appending session-specific tokens to URLs, embedding hidden base64-encoded tracking data in HTML clipboard payloads, and enabling cross-context user deanonymization. The t= parameter in URLs contains a persistent, base64-encoded token tied to the user’s session. Security tools detect this behavior as malicious due to its similarity to information-stealing malware. No opt-out or disclosure is provided.