Expedia (com.expedia.bookings): Privacy & Security Findings

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Permanent Disclosure Ledger

The discipline, demonstrated

On behalf of our research partners, we investigate publicly distributed Android and iOS apps: we decompile them, follow their code and data flows, and trace every connection to the servers it reaches. Hundreds of agents work through each app and join the technical evidence into one picture, which our specialists then review and verify.

387+
Android/iOS apps audited
Every app is decompiled at source-code level, not just scanned from outside.
1.04M+
Smali classes read
The full shipped code we have actually read, not an estimate.
262+
Critical findings recorded
Confirmed findings copied to regulators, not theoretical risks.
970+
Weak points found
Third-party tracking we have provably found inside the binary.
567+
Endpoints investigated
Real servers and countries where data actually flows.
132+
SDK instances mapped
Reusable libraries correlated across the entire corpus.
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Showing the report for Expedia.
OrganisationNotifiedStatusSevIntel (click to expand)StatutesResolvedDisclosureElapsedReport
Expedia
NASDAQ
2026-06-27
90d ago
CS deflect
High
Expedia starts collecting data the moment your phone restarts, before you have opened the app, and can read every account registered on your device along with a hardware identifier normally reserved for the operating system itself. It also sends your buy-now-pay-later financial assessment data to a US company without disclosing it, and only protects its connection against interception for one affiliate partner, not for its own payment pages.
Expedia Group Inc. (Seattle, US). Salesforce Marketing Cloud (1780 classes) - 2× pre-consent ContentProviders (MCInitContentProvider + SFMCSdkInitContentProvider) fire before consent. RECEIVE_BOOT_COMPLETED: tracking starts at device boot before app is opened. MANAGE_ACCOUNTS + GET_ACCOUNTS: reads all device accounts. READ_PRIVILEGED_PHONE_STATE: IMEI-level hardware identifier normally reserved for system apps. Datadog WebView module (170 classes): monitors all WebView content including third-party hotel partner pages. Affirm BNPL (306 classes): financial assessment data → US, undisclosed. Certificate pinning only for usebutton.com affiliate - not for Expedia own payment domains. AppsFlyer 497 classes. Firebase key AIzaSyDGeezqeG4YqDY03iNAPg3cGvvpt06zB1A hardcoded, project expedia-native-apps. Six messages sent across 71 days; security@/dpo@expedia.com hard-bounced. One reply arrived from Expedia's Privacy team, 51 days in, declining engagement on the grounds that the Privacy group does not address security vulnerabilities and redirecting to a bug-bounty inbox, despite this being a data-protection disclosure addressed to the DPO. No further reply followed. Case closed and published 2026-09-25, on the stated embargo date. BCC: DSB + BfDI + CERT.at.
click to expand
GDPR Art. 7GDPR Art. 5(1)(c)
Yes
Closed
Disclosure
90d 00h 00m 00s
Published
PDF

This ledger is updated in real time as companies respond. Silence is public. Severity is scored primarily by CVSS v4.0, we reserve the right to deviate based on blast radius.