Twitter Confirms Vulnerability Exposed Data of Anonymous Account Owners (twitter.com) 17
Friday the Twitter Privacy Center posted an announcement on their blog:
"We want to let you know about a vulnerability that allowed someone to enter a phone number or email address into the log-in flow in the attempt to learn if that information was tied to an existing Twitter account, and if so, which specific account. We take our responsibility to protect your privacy very seriously and it is unfortunate that this happened...."
Engadget explains: [T]he company said a malicious actor took advantage of a zero-day flaw before Twitter became aware of and patched the issue in January 2022. The vulnerability was discovered by a security researcher who contacted Twitter through the company's bug bounty program. When Twitter first learned of the flaw, it said it had "no evidence" to suggest it had been exploited. However, an individual told Bleeping Computer last month that they took advantage of the vulnerability to obtain data on more than 5.4 million accounts. Twitter said it could not confirm how many users were affected by the exposure.
From the Twitter Privacy Center: This bug resulted from an update to our code in June 2021. When we learned about this, we immediately investigated and fixed it. At that time, we had no evidence to suggest someone had taken advantage of the vulnerability.... After reviewing a sample of the available data for sale, we confirmed that a bad actor had taken advantage of the issue before it was addressed.
We will be directly notifying the account owners we can confirm were affected by this issue. We are publishing this update because we aren't able to confirm every account that was potentially impacted, and are particularly mindful of people with pseudonymous accounts who can be targeted by state or other actors.
If you operate a pseudonymous Twitter account, we understand the risks an incident like this can introduce and deeply regret that this happened. To keep your identity as veiled as possible, we recommend not adding a publicly known phone number or email address to your Twitter account.
"We want to let you know about a vulnerability that allowed someone to enter a phone number or email address into the log-in flow in the attempt to learn if that information was tied to an existing Twitter account, and if so, which specific account. We take our responsibility to protect your privacy very seriously and it is unfortunate that this happened...."
Engadget explains: [T]he company said a malicious actor took advantage of a zero-day flaw before Twitter became aware of and patched the issue in January 2022. The vulnerability was discovered by a security researcher who contacted Twitter through the company's bug bounty program. When Twitter first learned of the flaw, it said it had "no evidence" to suggest it had been exploited. However, an individual told Bleeping Computer last month that they took advantage of the vulnerability to obtain data on more than 5.4 million accounts. Twitter said it could not confirm how many users were affected by the exposure.
From the Twitter Privacy Center: This bug resulted from an update to our code in June 2021. When we learned about this, we immediately investigated and fixed it. At that time, we had no evidence to suggest someone had taken advantage of the vulnerability.... After reviewing a sample of the available data for sale, we confirmed that a bad actor had taken advantage of the issue before it was addressed.
We will be directly notifying the account owners we can confirm were affected by this issue. We are publishing this update because we aren't able to confirm every account that was potentially impacted, and are particularly mindful of people with pseudonymous accounts who can be targeted by state or other actors.
If you operate a pseudonymous Twitter account, we understand the risks an incident like this can introduce and deeply regret that this happened. To keep your identity as veiled as possible, we recommend not adding a publicly known phone number or email address to your Twitter account.