Fact check
Is it true: Marriott Starwood data breach (2014-18 disclosed)?
Yes — this is confirmed.
Starwood reservation database compromised since 2014. Marriott acquired Starwood Sep 2016 without detecting the intrusion. Breach disclosed 30 Nov 2018. ~339M guest records exposed including passport numbers and payment cards. APT10 (China MSS) attribution per US and UK intelligence. ICO GDPR fine £99.2M Jul 2019 reduced to £18.4M Oct 2020. 7M UK records affected.
The claim
The Marriott Starwood breach exposed approximately 339 million guest records — including passport numbers, encrypted payment card details, and travel history — from a database that had been compromise
Key evidence
Intrusion began 2014 — two years before Marriott acquisition closed
APT10 Attribution Reflects Industry-Wide Intelligence Consensus, Not Unverifiable Conspiracy Claim
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