CVE-2021-30533

criticalknown exploitedcovered by 1 sourcefirst seen 2022-06-27

Actively exploited. CVE-2021-30533 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-06-27) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

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.

CSIRTS triage

What: Google Chromium PopupBlocker contains an insufficient policy enforcement vulnerability that allows a remote attacker to bypass navigation restrictions via a crafted iframe.
Who is affected: Users of web browsers utilizing Chromium, including Google Chrome, Microsoft Edge, and Opera.
Urgency: Remediation is critical due to confirmed exploitation and high severity.
Action: Update to the latest version of Chromium-based browsers.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch CVE-2021-30533

Get an email if CVE-2021-30533 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.

Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 97% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalexploitedCVE-2021-30533: Google Chromium PopupBlocker Security Bypass Vulnerabilitycisa-kev · 2022-06-27

External references

NVD record for CVE-2021-30533

CVE.org record

CISA KEV catalog

Embed the live status

— this badge updates automatically when the KEV or exploit status changes. How to embed it →

[![CVE-2021-30533 status](https://www.csirts.com/badge/CVE-2021-30533)](https://www.csirts.com/cve/CVE-2021-30533)