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Workers'​ Compensation Insurance Rating Bureau of California (WCIRB)

Workers'​ Compensation Insurance Rating Bureau of California (WCIRB) Vendor Cyber Rating & Cyber Score

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The Workers’ Compensation Insurance Rating Bureau of California (WCIRB) is a private, nonprofit association of insurance companies licensed to transact workers'​ compensation insurance in the state of California. The WCIRB operates under the authority of the California Insurance Code, is licensed by the California Department of Insurance (CDI) and is the Insurance Commissioner’s designated statistical agent for workers comp insurance. The WCIRB develops proposed advisory pure premium rates for submission to the California Insurance Commissioner and administers the Commissioner’s workers’ compensation regulations contained in the California Workers’ Compensation Uniform Statistical Reporting Plan—1995, the California Workers’


WCIRBC A.I CyberSecurity Scoring

Incident Details
WCIRBC
Company Information
Website:http://www.wcirb.com
Employees number:198
Number of followers:7,751
NAICS:524
Industry Type:Insurance
Homepage:wcirb.com
Cyber Premium EstimationGet Supply Chain
WCIRBC Risk Score (AI oriented)
Between 650 and 699
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WCIRBCInsurance
Updated:
04/04/2026
684/1000
Weak
B
AaaAaABaaBaBCaaCaC
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✖ Insurance prefers TPRM score to calculate premium
WCIRBC Global Score (TPRM)
xxxx
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WCIRBCInsurance
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Findings

WCIRBC
WCIRBCWeak
Current Score
684B (WEAK)
01000
1 incidents
0 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
JULY 2026
689Before Incident
JUNE 2026
688Before Incident
MAY 2026
686Before Incident
APRIL 2026
684Before Incident
MARCH 2026
684Before Incident
FEBRUARY 2026
683Before Incident
JANUARY 2026
681Before Incident
DECEMBER 2025
680Before Incident
NOVEMBER 2025
679Before Incident
OCTOBER 2025
677Before Incident
SEPTEMBER 2025
675Before Incident
AUGUST 2025
674Before Incident
JULY 2025
752Before Incident
Breach
09 Jul 2025 • WCIRBC
Workers Compensation Insurance Rating Bureau of California (WCIRB)

Workers Compensation Insurance Rating Bureau of California (WCIRB) Data Breach

671After Incident
CRITICAL-81
WOR0103701101725
The Workers Compensation Insurance Rating Bureau of California (WCIRB) experienced a data breach in July 2025 after an unauthorized actor gained access to its third-party system, Box.com. The incident exposed sensitive personally identifiable information (PII) of potentially thousands of California workers, including names, addresses, dates of birth, Social Security numbers, employment details, health information, medical records, and workers’ compensation claim data. The breach was discovered on July 9, 2025, with data mining concluding on September 18, 2025. Affected individuals were notified in October 2025, and the incident was reported to the California Attorney General’s office on October 13, 2025. WCIRB offered free identity theft protection (IDX) to victims, but the exposure of highly sensitive data—particularly SSNs, medical records, and financial details—poses significant risks of identity theft, fraud, and long-term reputational harm to those affected. Legal investigations are underway for potential compensation claims due to the severity of the breach.
INCIDENT DETAILS -
TYPE
Data Breach (Third-Party System Compromise)
IMPACT
NameAddressDate of birthSocial Security numberEmployment informationHealth informationMedical recordsWorker's compensation claim informationBox.com (third-party system)Brand Reputation Impact: Potential reputational damage due to exposure of sensitive PIILegal Liabilities: Potential lawsuits and compensation claims for affected individualsIdentity Theft Risk: High (PII exposed, including SSNs)
DATA BREACH
Personally Identifiable Information (PII)Protected Health Information (PHI)Employment/Workers' compensation recordsNumber Of Records Exposed: Potentially thousands (exact number unreleased)Sensitivity Of Data: High (includes SSNs, medical records, and financial data)Data Exfiltration: Yes (data acquired by unauthorized actor)NameAddressDate of birthSocial Security numberEmployment informationHealth informationMedical records
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