Real Estate Mogul Exposes 307,768 Personal Records via Unsecured MongoDB
What Happened – In September 2016 a MongoDB instance used by Real Estate Mogul was left publicly accessible. An unauthorised party downloaded roughly 5 GB of data that included 308 k unique email addresses, names, phone numbers and physical addresses of sellers. The breach was disclosed in September 2018; no passwords or billing details were found in the leaked file.
Why It Matters for Trust & Control Assurance
- Unprotected data stores bypass the continuous‑monitoring controls that a control‑assurance program expects to evidence.
- The incident highlights the need for documented configuration‑management and encryption controls that can be audited across frameworks (e.g., NIST CSF 2.0).
- Demonstrable evidence of remediation (remediation tickets, monitoring logs) is essential for a defensible audit trail.
Who Is Affected – Real‑estate investors, property sellers, and any individuals whose contact information was listed on the platform (approximately 307,768 records).
Recommended Actions
- Conduct an immediate inventory of all data stores and verify that they are not exposed to the public internet.
- Apply encryption at rest and enforce strict access‑control policies for database services.
- Deploy continuous configuration‑monitoring tools and retain logs as audit evidence of compliance.
- Update the incident‑response playbook to include mis‑configuration detection and rapid containment steps.
Source: Have I Been Pwned – Real Estate Mogul breach
Technical Notes – Attack vector: mis‑configured MongoDB (no authentication). No CVE was involved; the exposure resulted from an operational oversight. Data types exposed: email addresses, full names, phone numbers, physical mailing addresses. Source: same as above