Illustration: Aïda Amer/AxiosTikTok says it has fixed a vulnerability that led to a rare type of cyberattack this week. Why it matters: Hackers sent a private, malware-laced message to users that took over their accounts as soon as the message was opened. TikTok confirmed to Axios that the unidentified hackers were able to take over CNN's account. Reports suggest that they also attempted to hijack Paris Hilton's TikTok account. Threat level: It remains unclear who is behind the attack and what v...