HackingHealthcareTechnologyHealthcareVulnerability ExploitData ExfiltratedSupply Chain (3P Vendor)Customer Data InvolvedDelayed DiscoveryIdentity (basic)Health (basic)LowContained

Welltok

bd_7a0d595bd5e1a3d3 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 26, 2023

Filed

Nov 17, 2023

To disclose

16 weeks

Affected

Not disclosed

Linked

22 filings

Confidence

65%

Full breach record for Welltok →3 incidents on file

Welltok, Inc. disclosed that an unknown actor exploited software vulnerabilities in its MOVEit Transfer server on May 30, 2023, exfiltrating data including names, member IDs, dates of birth, addresses, phone numbers, and medication information. The company was alerted to the compromise on July 26, 2023, and confirmed the breach on August 11, 2023. Affected individuals include customers of Prime Therapeutics and Stanford Health Care. Welltok is offering credit monitoring and identity restoration services.

J jump to incidentP pin to compareR raw source

California clockDiscovered Jul 26, 2023 → Notified Nov 18, 2023115d ✗ CA 60-day late16 weeks discovery → filing

Incident timeline

undetected · 57 days

discovery → filing · 16 weeks / 114 days

May 30, 2023

Begins

Jul 26, 2023

Discovered

Nov 17, 2023

Filed

vs. sector median

+7 wks slower

This filing is one of 22 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

Maine State AGbd_063b1deb8c7a2bff2023-12-15 · +28dVerified by operator
Vermont State AGbd_69d99adc86ef4dcf2023-12-15 · +28dVerified
California State AGbd_b765e398c9850ca12023-12-15 · +28dVerified
Maine State AGbd_0328ea1fdab9c4592023-12-22 · +35dVerified by operator

Show 6 more filings ↓up to 189d gap

California State AGbd_5e4b7107bd1176de2023-12-22 · +35dVerified
Vermont State AGbd_8ca9e17ac4dfbe9b2023-12-22 · +35dVerified
New Hampshire State AGbd_db6e6d3e58b51e902023-12-22 · +35dVerified
California State AGbd_cf54a7692c42c7aa2024-01-08 · +52dVerified by operator
California State AGbd_d2c5cdddd25b96d92024-02-28 · +103dVerified by operator
South Carolina State AGbd_57aa66e4578bd8912024-05-24 · +189dVerified by operator

Showing first 10 of 21 linked disclosures.

Name: Welltok
norm: welltok
Domain: welltok.com

Name: Welltok
norm: welltok
Domain: welltok.com
Industry: HealthcarellmTechnologyllm

Discovered: Jul 26, 2023
Breach occurred: May 30, 2023
Undetected for: 57 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 18, 2023
Affected individuals: Not disclosed
Data types: Identity (basic)Health (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: External
Initial access: exploit_public_facing

During the incident: Installed all published patches and security upgrades immediately upon such patches being made available
Conducted an examination of our systems and networks using all information available
Launched an additional investigation with the assistance of third-party cybersecurity specialists
Performed a full reconstruction of our systems and historical data
Undertook a time-consuming and detailed reconstruction and review of the data stored on the server
Notified potentially affected individuals
Offering complimentary access to Experian IdentityWorks for credit monitoring and identity restoration
Changes made: Reviewing and enhancing our existing policies and procedures related to data privacy
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 weeks(114 days from discovery to filing)
Compliance flags: CA 60-day late · 115d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Jul 26, 2023
→ Notified: Nov 18, 2023
115d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Jul 26, 2023 → Notified: Nov 18, 2023	115d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 5 states

View merged incident ↗

California State AGNov 17 · first · this page

Maine State AG+28d

Vermont State AG+28d

California State AG+28d

Maine State AG+35d

California State AG+35d

Vermont State AG+35d

New Hampshire State AG+35d

California State AG+52d

California State AG+103d

South Carolina State AG+189d

Pattern: first filing Nov 17 (CA), last May 24 (SC) — a 189-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 21 — 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://oag.ca.gov/ecrime/databreach/reports/sb24-576748
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 17, 2023
Raw hash: e4d30ed4523ace42284909c2293863f5e7a63dde819cdf65b3163a507e71737f

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityWelltok

Victim entityWelltok

Incidentdiscovered Jul 26, 2023

Stated responseInstalled all published patches and security upgrades immediately upon such patches being made available

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov