Winamax

We've been tracking a steady increase in breaches targeting online gambling platforms, often fueled by readily available credential stuffing lists and SQL injection vulnerabilities. What caught our attention with the Winamax breach wasn’t the volume of records, although 563,318 is significant, but the speed with which the data appeared on a well-known hacking forum after the initial compromise. This suggests a highly efficient exfiltration and distribution process, possibly indicating a more sophisticated attacker than typically seen in opportunistic breaches. The simplicity of the data exposed – primarily names and email addresses – belies the potential for downstream phishing and social engineering attacks.

Winamax Leak Exposes Over Half a Million User Records on Hacking Forum

The online gambling platform Winamax suffered a data breach in July 2025, resulting in the exposure of 563,318 user records. The compromised data, consisting of email addresses and full names, was subsequently posted on a popular hacking forum, making it readily accessible to malicious actors. The breach highlights the ongoing vulnerability of online gambling platforms to data compromises and the potential risks to users.

Our team discovered the breach while monitoring activity on a specific hacking forum known for hosting leaked databases. The Winamax data dump was posted on July 9, 2025, with the poster claiming the data was exfiltrated via a database vulnerability. What made this breach stand out was the relatively clean and structured nature of the data, suggesting a direct database dump rather than a messy scrape or credential stuffing attack. The immediate availability of the data on the forum also indicated a desire for rapid dissemination, potentially to maximize the impact of the breach.

This breach matters to enterprises because it underscores the interconnectedness of online services and the potential for cascading risks. While the data itself may seem limited, the combination of email addresses and full names is sufficient for highly targeted phishing campaigns. Attackers could leverage this information to impersonate Winamax, tricking users into revealing more sensitive information such as passwords, financial details, or even installing malware. Furthermore, compromised email addresses can be used for credential stuffing attacks on other online platforms, potentially leading to further account takeovers and data breaches. The incident highlights the importance of robust data protection measures and proactive monitoring for data breaches, even when the immediate impact appears limited.

Key point: Total records exposed: 563,318

Key point: Types of data included: Email Address, First Name, Last Name

Key point: Sensitive content types: PII (Personally Identifiable Information)

Key point: Source structure: Database

Key point: Leak location(s): Popular hacking forum

Key point: Date of first appearance: 09-Jul-2025

External Context & Supporting Evidence

While there has been no official statement from Winamax regarding the breach, discussions on the aforementioned hacking forum suggest the data is legitimate. Several users have reported verifying their own email addresses within the leaked data, lending credibility to the claim. One post stated, "Confirmed, my Winamax email is in there. Time to change passwords everywhere." Similar breaches targeting online gambling platforms have been reported in the past, often attributed to SQL injection vulnerabilities or misconfigured databases. For example, in 2024, BleepingComputer reported on a similar breach affecting another online gambling site, highlighting the ongoing security challenges faced by these platforms.

Email · Address · First · Name · Last