HackingFinancial ServicesTechnologyFinanceStolen CredentialsCapture Stored DataSupply Chain (3P Vendor)Customer Data InvolvedData ExfiltratedIdentity (basic)Financial accountLowContained

Expedia

bd_49e2f2da34543fd2 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 23, 2018

Filed

Aug 2, 2018

To disclose

10 days

Affected

13state residents only

Confidence

65%

American Express notified Montana AG of a data breach affecting its Orbitz travel booking platform, operated by third-party vendor Expedia. Unauthorized access occurred July 5-9, 2018. Impacted data included names, payment card info, and addresses. No SSNs or passport data were compromised. Amex offered 2 years of Experian IdentityWorks.

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Incident timeline

undetected · 18 days

discovery → filing · 10 days

Jul 5, 2018

Begins

Jul 23, 2018

Discovered

Aug 2, 2018

Filed

vs. sector median

9 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed13 affectedView incident

Name: AMERICAN EXPRESS COMPANY
norm: american express
Domain: americanexpress.com

Name: Expedia
norm: expedia
Industry: Financial ServicesllmTechnologyllm

Discovered: Jul 23, 2018
Breach occurred: Jul 5, 2018 – Jul 9, 2018
Undetected for: 18 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 31, 2018
Affected individuals: 13state-resident count only
Data types: Identity (basic)Financial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Third party: via Expedia
Initial access: supply_chain

During the incident: Arranged for complimentary two-year membership of Experian's IdentityWorks
Vigilantly monitoring Card accounts for fraud
Changes made: Expedia has taken remediation steps to prevent further access to the Orbitz platform
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 days(10 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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://dojmt.gov/wp-content/uploads/American-Express.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 2, 2018
Raw hash: e36ebc1216e58f67d57bc85310826732c7afa6a60831d9f40e95539e3ec93b64

Reporting entityAMERICAN EXPRESS COMPANY

Victim entityExpedia

Incidentdiscovered Jul 23, 2018

Stated responseArranged for complimentary two-year membership of Experian's IdentityWorks

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov