Twitter on Wednesday halted users’ ability to fire off tweets via text messages as it seeks to fix a vulnerability that led to CEO Jack Dorsey’s account being hijacked.
Dorsey last week was the target of so-called “SIM swap” fraud, which enables a hacker to trick a mobile carrier into transferring a number – potentially causing people to lose control not only of social media, but bank accounts and other sensitive information.
This type of attack targets a weakness in the use of “two-factor authentication” via text message to validate access to an account, a break-in method that has grown popular in recent years.
“We’re temporarily turning off the ability to Tweet via SMS, or text message, to protect people’s accounts,” the Twitter support team wrote on the platform.
“We’re taking this step because of vulnerabilities that need to be addressed by mobile carriers and our reliance on having a linked phone number for two-factor authentication.”
The San Francisco-based service added that as it works on a long-term solution to the problem, tweeting via text message eventually will be turned back on in markets where users rely on that technique.