Millions of people imperiled through sign-in links sent by SMS
Summary
A recent report highlights the insecurity of using SMS-based sign-in links, even by major services with millions of users. This practice exposes sensitive data and puts a large number of individuals at risk. The reliance on SMS for authentication is becoming increasingly problematic.
IFF Assessment
The article details a widespread security vulnerability that increases the risk of account compromise and data exposure.
Severity
Defender Context
Defenders should strongly discourage the use of SMS-based sign-in links due to their inherent insecurity and susceptibility to interception and manipulation. Organizations should prioritize migrating to stronger authentication methods such as multi-factor authentication (MFA) apps and hardware tokens. Monitoring for suspicious SMS traffic and educating users about the risks of clicking on links received via SMS are also crucial.