CVE-2021-30533CISA KEVEPSS p96.6%

CVE-2021-30533Google Chromium PopupBlocker Security Bypass Vulnerability

Google / Chromium PopupBlocker

Description

Google Chromium PopupBlocker contains an insufficient policy enforcement vulnerability that allows a remote attacker to bypass navigation restrictions via a crafted iframe. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Scoring

EPSS16.61% probability of exploitation · percentile 96.6% · 2026-06-18T12:00:27Z

CISA KEV entry

Added to KEV: 2022-06-27

(incoming)1

TypeTargetConfidenceTier
KEVEntryGoogle Chromium PopupBlocker Security Bypass Vulnerabilitykev-cve-2021-305330%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.