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Klaviyo bug exposed user passwords to advertisers

A bug in Klaviyo's website inadvertently exposed user sign-up information, including passwords, to numerous advertisers. This data breach affected users who had recently signed up for the service, potentially compromising their personal details and login credentials. The incident highlights ongoing cybersecurity risks associated with third-party data sharing. AI

IMPACT Highlights potential security vulnerabilities in marketing and data management platforms.

RANK_REASON The cluster describes a bug in a specific software product that led to a data exposure incident.

Read on Mastodon — mastodon.social →

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Klaviyo bug exposed user passwords to advertisers

COVERAGE [1]

  1. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    Signed up for Klaviyo? Dozens of advertisers may have seen your password A bug in the tech giant's website mistakenly shared users' sign-up information, includi

    Signed up for Klaviyo? Dozens of advertisers may have seen your password A bug in the tech giant's website mistakenly shared users' sign-up information, including personal data and their password, to third-party companies. https:// techcrunch.com/2026/08/10/sign ed-up-for-klaviyo…