Cybersecurity researchers recently identified a massive online database that was left publicly accessible without any security protections, exposing a vast collection of professional and personal information. The database contained more than 16 terabytes of data, representing over 4.3 billion individual records that could be accessed without authorization.
Researchers associated with Cybernews reported that the exposed dataset is among the largest lead-generation style databases ever discovered online. The information appears to be compiled from publicly available professional profiles, including data commonly found on LinkedIn, such as profile handles, URLs, and employment-related details.
The exposed records included extensive personal and professional information. This ranged from full names, job titles, employer names, and work histories to education records, degrees, certifications, skills, languages, and location data. In some cases, the datasets also contained phone numbers, email addresses, social media links, and profile images. Additional information related to corporate relationships and contract-linked data was also present, suggesting the dataset was built for commercial or business intelligence purposes.
Investigators believe the data was collected gradually over several years and across different geographic regions. The database was stored in a MongoDB instance, a system commonly used by organizations to manage large volumes of information efficiently. While MongoDB itself is widely used, leaving such databases unsecured can expose sensitive information at scale, which is what occurred in this incident.
The exposed database was discovered on November 23 and secured approximately two days later. However, researchers were unable to determine how long the data had been accessible before it was identified. The exposure is believed to have resulted from misconfiguration or human error rather than a deliberate cyberattack, a common issue in cloud-based data storage environments.
Researchers noted that the database was highly organized and structured, indicating the information was intentionally collected and maintained. Based on its format, the data also appears to be relatively current and accurate.
Such large datasets are particularly attractive to cybercriminals. When combined with automated tools or large language models, this information can be used to conduct large-scale phishing campaigns, generate fraudulent emails, or carry out targeted social engineering attacks against individuals and corporate employees.
Security experts recommend that individuals take precautionary measures following incidents like this. This includes updating passwords for professional networking accounts such as LinkedIn, email services, and any connected financial accounts. Users should also remain cautious of unexpected emails, messages, or phone calls that attempt to pressure them into sharing personal information or clicking unknown links.
Although collecting publicly available data is not illegal in many jurisdictions, failing to properly secure a database of this size may carry legal and regulatory consequences. At present, the ownership and purpose of the database remain unclear. Further updates are expected if more information becomes available or accountability is established.
Qantas Airways has revealed that a cyber attack on one of its third-party service platforms may have compromised the personal data of up to six million customers. The breach was linked to a customer service tool used by a Qantas-operated call centre, and the airline confirmed that suspicious activity was detected earlier this week.
In an official statement, Qantas said a malicious actor gained access to this external platform, but the intrusion has since been contained. Investigations are ongoing to determine how much customer data was exposed, though initial findings suggest the impact could be significant.
The company confirmed that the exposed information may include customer names, contact numbers, email addresses, dates of birth, and frequent flyer membership numbers. However, Qantas clarified that no financial data—such as credit card details, bank information, or passport numbers—was stored on the affected system.
The airline also confirmed that sensitive account credentials, such as passwords, login PINs, and security information, were not accessed. Flight operations and the safety of air travel have not been affected by this breach.
Qantas Group CEO Vanessa Hudson addressed the incident, expressing regret over the situation. “Our customers place their trust in us to protect their personal data, and we deeply regret that this has occurred. We are contacting affected individuals directly and are committed to offering them full support,” she said.
To assist impacted customers, Qantas has launched a dedicated help centre offering expert guidance on identity protection. The support service is reachable at 1800 971 541 or +61 2 8028 0534 for international callers. Customers with upcoming flights have been assured that they do not need to take any action regarding their bookings.
Australian authorities have been notified, including the Australian Cyber Security Centre, the Office of the Australian Information Commissioner (OAIC), and the Australian Federal Police. Qantas has pledged full cooperation with the agencies involved in the investigation.
Shadow Minister for Cyber Security Melissa Price commented on the breach during an interview with ABC, calling it a serious wake-up call for all Australian companies. She emphasized the need for transparency and continuous updates to the public when incidents of this scale occur.
This breach adds to a growing list of cybersecurity incidents in Australia. Other major organizations, including AustralianSuper and Nine Media, have also suffered data leaks in recent months.
Earlier this year, the OAIC reported that 2024 saw the highest number of recorded data breaches since tracking began in 2018. Australian Privacy Commissioner Carly Kind warned that the risks posed by cyber threats are growing and called on both private companies and public agencies to strengthen their defences.
As data breaches become more frequent and complex, cybersecurity remains a critical issue for businesses and consumers alike.