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

Confidence

64%

Full breach record for CBIZ, INC. →7 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

4 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1,190 affectedView incident

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.

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

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