The article states
> Fortunately, all the affected services were notified of the vulnerabilities and have implemented the necessary fixes.
this is right after they list the affected services
> Top services affected > In their study, the researchers examined 75 services that ranked among Alexa’s list of top-150 high-traffic domains. At least 35 were affected by one or more account pre-hijacking attacks, including Dropbox, Instagram, LinkedIn, WordPress.com, and Zoom. Fortunately, all the affected services were notified of the vulnerabilities and have implemented the necessary fixes.