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Gmail And HTML 5

ID: d815d6b9-e888-5c9c-a8ed-b8b83b90d7a6

STIX ID: report--d815d6b9-e888-5c9c-a8ed-b8b83b90d7a6

Feed Name: Zscaler Security Research Blog

Threat Score
20/100

Date Published: 2025-04-02

Date Updated: 2026-05-01

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The author examines Gmail's HTML5-based offline storage implementation (local SQLite databases created by WebKit/Safari), lists the tables and stored content, and warns that XSS vulnerabilities could permit remote attackers to read or write local data—creating privacy and data integrity risks—while noting no evidence of current exploitation.

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