6.5
Medium
Exploited
CVE-2021-30533 Google Chromium PopupBlocker Security Bypass Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
Apply updates per vendor instructions.
Ransomware campaigns
Not observed so far
Weakness
CWE-863
Description
Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Chrome 91.0 | earliest → < 91.0.4472.77 | 91.0.4472.77 |
References
- chromereleases.googleblog.com chromereleases.googleblog.com
- crbug.com crbug.com
- GLSA-202107-06 security.gentoo.org
- FEDORA-2021-f94dadff78 lists.fedoraproject.org
- FEDORA-2021-ca58c57bdf lists.fedoraproject.org
Timeline
- Published
- Added to the KEV catalogue
- Last modified
Other CVEs of Chrome
The 6072 CVEs of Chrome →
CVE-2026-120930
Incorrect authorization in Blink in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to bypass web…
5.4
Medium
CVE-2026-120931
Out of bounds write in WebGL in Google Chrome on on Android prior to 156.0.8078.47 allowed a remote attacker to…
9.6
Critical
CVE-2026-121141
Improper input validation in Editing in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social…
5.4
Medium
CVE-2026-121195
Incorrect authorization in TrustedTypes in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass…
8.8
High