Otelier Data Breach Exposes Hotel Guest Information via Amazon S3
2025-01-20
Learn about the critical role of credential security and cloud storage protection in preventing data breaches, and leverage this insight to highlight the importance of comprehensive cloud security solutions.
Otelier, a hotel management platform, experienced a data breach when attackers accessed its Amazon S3 storage, stealing nearly eight terabytes of data, including personal and reservation details of hotel guests from brands like Marriott, Hilton, and Hyatt. The breach, which occurred from July to October 2024, was facilitated by stolen credentials obtained through malware, allowing attackers to access Atlassian servers and subsequently Otelier's S3 buckets. While passwords and billing information remained secure, the exposed data included guests' names, addresses, phone numbers, and email addresses. Otelier has since terminated unauthorized access, disabled affected accounts, and is enhancing its cybersecurity measures to prevent future incidents.
Sensitive Data, Malware, Weak or Compromised Credentials, Third-Party Vendor/SaaS
Otelier, Data Breach, Amazon S3, Credential Theft, Hotel Industry
N/A
Amazon S3, Atlassian, Marriott, Hilton, Hyatt
Otelier, a hotel management platform, experienced a significant data breach when malicious actors accessed their Amazon S3 cloud storage. This breach resulted in the exposure of nearly eight terabytes of sensitive information, including personal and reservation details for guests of major hotel brands such as Marriott, Hilton, and Hyatt. The breach began in July 2024 and continued until October 2024. Attackers exploited stolen credentials to gain unauthorized access to Otelier's Atlassian server. These credentials were compromised through malware, a common threat vector that has plagued corporate networks. Once inside, the attackers extracted further credentials, which they used to infiltrate the company's Amazon S3 buckets. The attackers managed to download 7.8 terabytes of data from Otelier's cloud storage. This data encompassed a wide range of documents, including nightly hotel reports, shift audits, and accounting data. Personal information such as guests' names, addresses, phone numbers, and email addresses were exposed. Fortunately, passwords and billing information were not compromised. Upon discovering the breach, Otelier promptly communicated with affected customers and enlisted cybersecurity experts to perform a comprehensive forensic analysis. Unauthorized access was terminated, and compromised accounts were disabled. Otelier is actively working to strengthen its cybersecurity protocols to prevent future incidents. This breach underscores the critical importance of securing cloud storage and protecting credentials. Organizations must adopt robust security measures, including regular credential rotations and malware defenses, to safeguard sensitive information and prevent similar breaches.Otelier Data Breach Uncovers Vulnerabilities in Cloud Storage
Incident Overview
Timeline and Method of Attack
Data Exposed
Response and Mitigation
Lessons for Cloud Security