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Watered Down Phishing Protection In IPhone OS 3.X?

ID: f88351a4-6c2c-501f-a5d3-20b90013701c

STIX ID: report--f88351a4-6c2c-501f-a5d3-20b90013701c

Feed Name: Zscaler Security Research Blog

Threat Score
30/100

Date Published: 2025-04-02

Date Updated: 2026-05-01

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The report describes that iPhone OS 3.1's Mobile Safari 'Fraud Warning' anti-phishing feature was not effectively blocking validated phishing sites; testing showed many PhishTank-listed pages blocked on desktop Safari were not blocked on the iPhone, likely due to denylist updates not being pushed to devices, causing inconsistent behavior across phones.

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