ACTIVELY EXPLOITED
CVE-2021-30533: Google Chromium PopupBlocker Security Bypass Vulnerability
| Vendor | |
|---|---|
| Product | Chromium PopupBlocker |
| Actively exploited | Yes |
| Added to CISA KEV | 27 Jun 2022 |
| CISA federal deadline | 18 Jul 2022 |
| Weakness (CWE) | CWE-863 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
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.
SOURCES
Other Google flaws
- CVE-2026-125350: Google Chromium Use-After-Free Vulnerability
- CVE-2026-111497: Google Brotli Unchecked Return Value Vulnerability
- CVE-2026-58704: Google Pixel Improper Authorization Vulnerability
- CVE-2026-87491: Google Chromium V8 Out of Bounds Write Vulnerability
- CVE-2026-85046: Google Chromium V8 Type Confusion Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.