HackingProfessional ServicesProfessional ServicesVulnerability ExploitData ExfiltratedTargetedIdentity (basic)Government IDHighContained

CBIZ, INC.

bd_1c8025d02f0809fc · schema v1 · pii pii-v1

Severity

High

Discovered

May 31, 2023

Filed

Sep 5, 2023

To disclose

14 weeks

Affected

1,190state residents only

Linked

11 filings

Confidence

64%

Full breach record for CBIZ, INC. →4 incidents on file

CBIZ, Inc. notified South Carolina residents of a data incident involving the MOVEit Transfer software provider, Progress Software. An unauthorized party exploited a vulnerability in MOVEit to access a CBIZ server and download data containing names, dates of birth, and Social Security numbers between May 29 and June 5, 2023. CBIZ patched the vulnerability and offered two years of identity monitoring.

J jump to incidentP pin to compareR raw source

South Carolina clock✓ SC CRA notice due14 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 · 14 weeks / 97 days

May 29, 2023

Begins

May 31, 2023

Discovered

Sep 5, 2023

Filed

vs. sector median

6 wks faster

This filing is one of 11 filings about the same incident.View merged incident

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

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Massachusetts State AGbd_59823e08633c31c12023-09-01 · +4dVerified by operator
Montana State AGbd_79465978a9228cee2023-09-01 · +4dVerified by operator
New Hampshire State AGbd_ab8685161ea5f6d12023-09-01 · +4dVerified by operator
Maine State AGbd_b2aef612a1f1ebc82023-09-01 · +4dVerified by operator

Show 6 more filings ↓up to 115d gap

Indiana State AGbd_babe041abe73d82b2023-09-01 · +4dVerified by operator
California State AGbd_bc1e70e9424da1a02023-09-01 · +4dVerified by operator
Vermont State AGbd_f5753075017fc5292023-09-01 · +4dVerified by operator
HHS OCRbd_b21836f9b07f5b0e2023-11-10 · +66dVerified by operator
New Hampshire State AGbd_58c107ea2a926a352023-12-29 · +115dVerified
Maine State AGbd_a81b1fd6324d50b12023-12-29 · +115dVerified 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: —
Affected individuals: 1,190state-resident count only
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 the protocols we have in place with our vendors
Offering you two free years of identity monitoring services through Kroll
Changes made: Reviewed the protocols we have in place with our vendors to help prevent something like this from happening again
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(97 days from discovery to filing)
Compliance flags: SC CRA notice due
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 · 11 filings · 9 states

View merged incident ↗

Massachusetts State AGSep 1 · first

Montana State AGSep 1 · first

New Hampshire State AGSep 1 · first

Maine State AGSep 1 · first

Indiana State AGSep 1 · first

California State AGSep 1 · first

Vermont State AGSep 1 · first

South Carolina State AG+4d · this page

HHS OCR+70d

New Hampshire State AG+119d

Maine State AG+119d

Pattern: first filing Sep 1 (MA), 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://consumer.sc.gov/sites/consumer/files/Documents/Security%20Breach%20Notices/CBIZInc.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 5, 2023
Raw hash: 4789b0a3934c2416ea3108d763108b56dfccc7819af538e8b7fcd0934534304a

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityCBIZ, INC.

Victim entityCBIZ, INC.

Incidentdiscovered May 31, 2023

Stated responsePatched the MOVEit vulnerability

ComplianceSC CRA notice due

Extraction provenanceno artifact recorded

Source provenanceconsumer.sc.gov