willhaben: Privacy & Security Findings

report - rfi-irfos
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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.
1 of 387 entries · sorted by elapsed ↓
Showing the report for willhaben.
OrganisationNotifiedStatusSevIntel (click to expand)StatutesResolvedDisclosureElapsedReport
willhaben
Private
2026-06-19
92d ago
CS deflect
High
Austria's biggest classifieds app ships hardcoded cloud keys, a hijackable login flow, and a payment link any other app could intercept mid-checkout. When reported, the privacy inbox sent only automated tickets, then threatened legal action over payment terms instead of addressing the findings.
Three hardcoded Firebase keys, an OAuth login redirect with no state validation open to hijacking, and an interceptable payment-return scheme. Braze routes sale and login events to a US data center over the available EU endpoint. Five automated tickets, zero human reply, before Security called RFI-IRFOS's model legally abusive.
click to expand
GDPR Art. 32OWASP M1GDPR Art. 44
Yes
Closed
Disclosure
92d 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.