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Whenever you tap a link in TikTok, the app will open it through an in-app browser, which is a way to keep you within the app. But security researcher Felix Krause found that when you open links in TikTok's browser, it injects JavaScript into the external site so it can monitor all keyboard input and taps. But TikTok denies it's used for malicious reasons.
According to Krause, the in-app browser "subscribes" to all inputs while interacting on the site, including sensitive details like passwords and credit card information.
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