HackingProfessional ServicesProfessional ServicesVulnerability ExploitData ExfiltratedIdentity (basic)Government IDMediumContained

CBIZ, INC.

bd_f5753075017fc529 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 31, 2023

Filed

Sep 1, 2023

To disclose

13 weeks

Affected

Not disclosed

Linked

5 filings

Confidence

66%

Full breach record for CBIZ, INC. →7 incidents on file

CBIZ, Inc. disclosed a data breach involving its MOVEit Transfer server, exploited via a vulnerability in Progress Software's software. Unauthorized access occurred between May 29 and June 5, 2023, resulting in the exfiltration of names, dates of birth, and Social Security numbers. CBIZ patched the vulnerability and offered two years of identity monitoring services.

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Vermont clock✗ VT AG >45 bday13 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 2 days

discovery → filing · 13 weeks / 93 days

May 29, 2023

Begins

May 31, 2023

Discovered

Sep 1, 2023

Filed

vs. sector median

4 wks faster

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Maine State AGbd_b2aef612a1f1ebc82023-09-01Verified by operator
California State AGbd_bc1e70e9424da1a02023-09-01Verified by operator
HHS OCRbd_b21836f9b07f5b0e2023-11-10 · +70dVerified by operator
Maine State AGbd_a81b1fd6324d50b12023-12-29 · +119dVerified by operator

Name: CBIZ, INC.
norm: cbiz
Domain: cbiz.com

Name: CBIZ, INC.
norm: cbiz
Domain: cbiz.com
Industry: Professional Servicesllm

Discovered: May 31, 2023
Breach occurred: May 29, 2023 – Jun 5, 2023
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 1, 2023
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: exploit_public_facing

During the incident: Patched the MOVEit vulnerability
Reviewed protocols with vendors
Offered two free years of identity monitoring services through Kroll
Changes made: Reviewed protocols with vendors to help prevent something like this from happening again
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 weeks(93 days from discovery to filing)
Compliance flags: VT AG >45 bday
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 4 states

View merged incident ↗

Maine State AGSep 1 · first

California State AGSep 1 · first

Vermont State AGSep 1 · first · this page

HHS OCR+70d

Maine State AG+119d

Pattern: first filing Sep 1 (ME), last Dec 29 (ME) — a 119-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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://ago.vermont.gov/document/2023-09-01-cbiz-progress-software-moveit-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 1, 2023
Raw hash: 1fcee4d819826b88c32a70526bc232a95c2787288083787587f8a78e93212db4

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityCBIZ, INC.

Victim entityCBIZ, INC.

Incidentdiscovered May 31, 2023

Stated responsePatched the MOVEit vulnerability

ComplianceVT AG >45 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov