HackingProfessional ServicesGovernmentProfessional ServicesVulnerability ExploitZero-DayData ExfiltratedTargetedPIIIdentity (basic)MediumContained

MAXIMUS, Inc.

bd_a90da3e7c4e0509c · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 30, 2023

Filed

Aug 29, 2023

To disclose

13 weeks

Affected

77,405state residents only

Linked

17 filings

Confidence

65%

Full breach record for MAXIMUS, Inc. →7 incidents on file

Maximus Health Services, Inc. disclosed a security incident involving the MOVEit Transfer vulnerability (Progress Software). Unauthorized access occurred May 27-31, 2023, resulting in the exfiltration of personal information. Maximus detected the incident on May 30, 2023, took systems offline, engaged forensic experts, and notified law enforcement. Affected individuals are offered two years of credit monitoring.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >30d13 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 · 3 days

discovery → filing · 13 weeks / 91 days

May 27, 2023

Begins

May 30, 2023

Discovered

Aug 29, 2023

Filed

vs. sector median

6 wks faster

This filing is one of 17 about the same incident.View merged incident

A leak claim by cl0p about this victim predates this filing by 34 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Oregon State AGbd_4a2584ab84dfe0f12023-08-29Verified by operator
Hawaii State AGbd_d3d3db6e2dd7a7a82023-08-26 · +3dVerified by operator
Vermont State AGbd_67d6131ab83daa012023-08-25 · +4dVerified by operator
Delaware State AGbd_97027e573fc51e132023-08-25 · +4dVerified by operator

Show 6 more filings ↓up to 134d gap

Washington State AGbd_d4deac1eb085d27a2023-08-25 · +4dVerified
New Hampshire State AGbd_fe9387821fda92642023-08-25 · +4dVerified by operator
Indiana State AGbd_45d3fdf48f1c933d2023-08-24 · +5dVerified by operator
California State AGbd_bf25ea19ea12a1242023-08-18 · +11dVerified
HHS OCRbd_dedafa3bd216907a2023-08-04 · +25dVerified
Idaho State AGbd_5312733f463970a32024-01-10 · +134dVerified by operator

Showing first 10 of 16 linked disclosures.

Name: MAXIMUS, Inc.
norm: maximus
Domain: maximus.com

Name: MAXIMUS, Inc.
norm: maximus
Domain: maximus.com
Industry: Professional ServicesllmGovernmentllm

Discovered: May 30, 2023
Breach occurred: May 27, 2023 – May 31, 2023
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 77,405state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: notified the Department of the incident
Initial access: exploit_public_facing

During the incident: Took the MOVEit environment offline early on May 31, 2023
Applied vendor-recommended actions to address the previously unknown vulnerability
Investigated with the help of nationally recognized cybersecurity experts
Notified and is cooperating with law enforcement
Changes made: Enhance our cybersecurity program to safeguard from cyber threats
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 weeks(91 days from discovery to filing)
Compliance flags: Leak >30dSC 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 · 11 states

View merged incident ↗

HHS OCRAug 4 · first

California State AG+14d

Indiana State AG+20d

Vermont State AG+21d

Delaware State AG+21d

Washington State AG+21d

New Hampshire State AG+21d

Hawaii State AG+22d

Oregon State AG+25d

South Carolina State AG+25d · this page

Idaho State AG+159d

Pattern: first filing Aug 4 (VA), last Jan 10 (ID) — a 159-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 16 — the full spread may be wider.

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/MaximusInc.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 29, 2023
Raw hash: 88dd9a26d72fd3dba69335b1a6551668b4c3bab899c625f9167ddba87000d3ef

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityMAXIMUS, Inc.

Victim entityMAXIMUS, Inc.

Incidentdiscovered May 30, 2023

Stated responseTook the MOVEit environment offline early on May 31, 2023

ComplianceLeak >30d

Extraction provenanceno artifact recorded

Source provenanceconsumer.sc.gov