HackingTechnologyProfessional ServicesInformationVulnerability ExploitZero-DaySupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

COSTAR REALTY INFORMATION, INC.

bd_88e53ed950e487c2 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 1, 2023

Filed

Jul 17, 2023

To disclose

7 weeks

Affected

2state residents only

Confidence

66%

Full breach record for COSTAR REALTY INFORMATION, INC. →

CoStar Realty Information, Inc. (via vendor Vitality Group, LLC) disclosed a MOVEit zero-day vulnerability incident. Unauthorized access occurred May 30, 2023. Vitality detected the risk June 1, 2023, disconnected the server, and applied patches. 2 NH residents affected; data included name, address, DOB, email, SSN. Notification sent July 17, 2023, with 24 months credit monitoring.

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Incident timeline

undetected · 2 days

discovery → filing · 7 weeks / 46 days

May 30, 2023

Begins

Jun 1, 2023

Discovered

Jul 17, 2023

Filed

vs. sector median

6 wks faster

Part of Progress Software Corporation supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed2 affectedView incident

Name: Vitality
norm: vitality
Domain: shopvitality.com

Name: COSTAR REALTY INFORMATION, INC.
norm: costar realty information
Industry: TechnologyllmProfessional Servicesllm

Discovered: Jun 1, 2023
Breach occurred: May 30, 2023 – May 30, 2023
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 17, 2023
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Office of the Attorney General
Initial access: exploit_public_facing

During the incident: Vitality disconnected the MOVEit software server
Vitality temporarily disabled access to MOVEit
Vitality began forensics investigations
Vitality’s security team conducted a thorough forensic analysis
Vitality applied all available patches provided by MOVEit
Vitality implemented a password reset on every account that accesses the server
Vitality notified the Data Owner of the security incident
Changes made: Vitality applied all available patches provided by MOVEit
Vitality implemented a password reset on every account that accesses the server
Vitality followed all recommendations published by MOVEit
Vitality is continuing to monitor the situation carefully
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(46 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://mm.nh.gov/files/uploads/doj/remote-docs/costar-realty-information-20230717.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 17, 2023
Raw hash: 3ef3dbf917ff6e999f3b2227739b81fdb506fe17b930d67feac543d61ba74bab

Reporting entityVitality

Victim entityCOSTAR REALTY INFORMATION, INC.

Incidentdiscovered Jun 1, 2023

Stated responseVitality disconnected the MOVEit software server

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov