Microsoft found TikTok Android flaw that let hackers hijack accounts

Microsoft found and reported a high severity flaw in the TikTok Android app in February that allowed attackers to “Quickly and quietly” take over accounts with one click by tricking targets into clicking a specially crafted malicious link.

“Attackers could have leveraged the vulnerability to hijack an account without users’ awareness if a targeted user simply clicked a specially crafted link,” Microsoft 365 Defender Research Team’s Dimitrios Valsamaras said.

Clicking the link exposed more than 70 JavaScript methods that could be abused by an attacker with the help of an exploit designed to hijack the TikTok app’s WebView.

“A WebView Hijacking vulnerability was found on the TikTok Android application via an un-validated deeplink on an un-sanitized parameter. This could have resulted in account hijacking through a JavaScript interface,” the HackerOne report further explains.

In November 2020, TikTok fixed vulnerabilities that enabled threat actors to quickly hijack the accounts of users who signed up via third-party apps.

The company has also addressed other security flaws that could have allowed attackers to steal users’ personal information or hijack their accounts to manipulate videos.

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