#brevo
Brevo login flaw enabled phishing email targeting 347K Trezor subscribers
An attacker exploited a flaw in email platform Brevo’s login system to access 138 client accounts, enabling a phishing email to reach roughly 347,000 Trezor newsletter subscribers and similar fraudulent messages to be distributed through accounts belonging to hardware wallet maker BitBox and crypto portfolio tracking and tax-reporting platform CoinTracking
In a Thursday postmortem, Brevo said six accounts were used to send phishing emails, contacts were exported from 43 and 93 accounts showed no meaningful activity. The platform did not specify whether the categories overlapped
The attacker created a Brevo account, enabled single sign-on and invited legitimate Brevo users into the configuration. Brevo said access should have been confined to that organization, but an authorization boundary failed and granted access to every organization the invited users could reach
The disclosure expands on warnings issued by Trezor and BitBox on Wednesday, identifying their shared provider and explaining why the emails passed normal authentication checks and appeared genuine
Cointelegraph reached out to Brevo for more information but did not receive a response before publication
Crypto firms assess potential subscriber exposure
In a blog post, Trezor said the phishing message, titled “Critical Security Alert: STM32 Entropy Vulnerability,” contained a link to an app that requested users’ wallet backups. The company disabled the domain at the DNS level within 20 minutes, but about 2,500 people accessed the link before the takedown
A Trezor spokesperson told Cointelegraph that the initial email was sent to 347,000 customers,all of whom were subsequently contacted about the risk. The company’s Brevo account stored only opt-in newsletter email addresses and no other customer data
“Until we hear more from Brevo, we are treating all roughly 347,000 newsletter addresses as known to the attacker and possibly reusable for phishing,” the spokesperson said.#Write2Earn $BREV
Brevo login flaw enabled phishing email targeting 347K Trezor subscribers
An attacker exploited a flaw in email platform Brevo’s login system to access 138 client accounts, enabling a phishing email to reach roughly 347,000 Trezor newsletter subscribers and similar fraudulent messages to be distributed through accounts belonging to hardware wallet maker BitBox and crypto portfolio tracking and tax-reporting platform CoinTracking
In a Thursday postmortem, Brevo said six accounts were used to send phishing emails, contacts were exported from 43 and 93 accounts showed no meaningful activity. The platform did not specify whether the categories overlapped
The attacker created a Brevo account, enabled single sign-on and invited legitimate Brevo users into the configuration. Brevo said access should have been confined to that organization, but an authorization boundary failed and granted access to every organization the invited users could reach
The disclosure expands on warnings issued by Trezor and BitBox on Wednesday, identifying their shared provider and explaining why the emails passed normal authentication checks and appeared genuine
Cointelegraph reached out to Brevo for more information but did not receive a response before publication
Crypto firms assess potential subscriber exposure
In a blog post, Trezor said the phishing message, titled “Critical Security Alert: STM32 Entropy Vulnerability,” contained a link to an app that requested users’ wallet backups. The company disabled the domain at the DNS level within 20 minutes, but about 2,500 people accessed the link before the takedown
A Trezor spokesperson told Cointelegraph that the initial email was sent to 347,000 customers,all of whom were subsequently contacted about the risk. The company’s Brevo account stored only opt-in newsletter email addresses and no other customer data
“Until we hear more from Brevo, we are treating all roughly 347,000 newsletter addresses as known to the attacker and possibly reusable for phishing,” the spokesperson said.#Write2Earn $BREV
