Twitter apologized to its business clients via email for compromising their personal information, including phone numbers, email addresses, and the ending four digits of credit card numbers.
According to Twitter, it was "possible" others could have accessed their billing information stored in the browser's cache.
The breach affects businesses using Twitter's advertising and analytics platforms.
It's not yet clear how many businesses have been affected.
Twitter believes that the breach did not affect non-business users.
In its email to affected users, Twitter said it learned of the issue on May 20 and has since fixed the problem, adding that they are committed to earning the trust given by their clients.
The company has previously compromised data.
In 2018, Twitter asked its users to change passwords due to an internal data leak.


Samsung Gains Interest from BYD, Google, AMD as AI Chip Demand Strains TSMC Capacity
Kingboard Holdings Shares Surge After HK$11.77 Billion Block Trade to Expand PCB and AI Supply Chain Business
John Jumper Leaves Google DeepMind for Anthropic Amid Intensifying AI Talent Race
Chinese Social Media Giant Xiaohongshu Eyes Hong Kong IPO at Over $70 Billion Valuation
Ukrainian Drone Makers Target Japan and Asia Defense Market
Obayashi to Acquire Multiplex in $526M Expansion Deal
BHP Shares Fall as Jansen Potash Project Costs Surge
HSBC Australia Faces A$35M Penalty Over Scam Protection Failures
GM and Lockheed Martin Partner to Strengthen U.S. Defense Manufacturing Capacity
Microsoft Taps AWS to Support GitHub Amid AI Coding Boom
G7 Explores AI Access Deal With U.S. Amid Anthropic Restrictions
Apple Signals Product Price Hikes Amid Rising Memory Chip Costs
Hyundai to Acquire SoftBank’s Remaining Boston Dynamics Stake for $325 Million
Frank Stronach Found Guilty of Sexual Assault and Indecent Assault in Ontario Court
Saudi Aramco Explores Sulphur Business Stake Sale to Raise Billions
US Raises Concerns Over Possible ASML EUV Machine Transfer to China
Qantas Unveils Wellness-Focused Nonstop Sydney-London Flights to Reduce Jet Lag 



