- Chess.com discloses in June 2025 Cyberattack which exhibited data from 4,541 users
- Pirates have used a vulnerable third -party file transfer tool; Basic systems have not been raped
- No connection or payment data has been stolen; Victims obtain free identity theft and credit monitoring
Chess.com, the largest and most popular chess game platform, confirmed to suffer from a cyber attack in which it has lost sensitive information on a small fragment of its user base.
In a data violation notification filed with the Maine Prosecutor’s Office General, the company said that the incident occurred on June 5 and was spotted about two weeks later on June 19.
In total, 4,541 people were exposed, out of 200 million + registered users of Chess.com.
Intact infrastructure
The pirates, who were not appointed in the report, managed to steal data via a third -party managed file transfer tool used Chess.com.
The company did not mean which it was, but Save the future news I found two popular brands of file transfer tools – Wing FTP and Cratshftp, both pointing out “serious vulnerabilities” in July 2025, which customers were invited to correct.
The company also stressed that its code and infrastructure had remained intact and that so far, there was no evidence that stolen files had been mistreated in the wild.
We do not know what type of information they stole, apart from people’s names – because Chess.com has confirmed that banking information and connection details were not compromised.
So far, no one has claimed the responsibility of the attack.
Chess.com did what most companies do a cyber attack in the aftermath – hired a team of third -party cybersecurity, launched an investigation, informed the relevant authorities and alerted to affected people. It also offers free identity theft and credit monitoring for victims.
The platform was founded in 2007 and has since grown up to become the number one place for chess enthusiasts. Beyond the gameplay, failures have a huge social component: players can join clubs, discuss and follow streamers or great masters. The platform has applications for the web, iOS and Android, and offers a mixture of occasional games, training tools and professional emissions.
Via Bleeping Compompute
