CVE-2021-30533 Google Chromium PopupBlocker Security Bypass

What is CVE-2021-30533?

CVE-2021-30533 is a medium-severity vulnerability in Fedoraproject Fedora, published on 7 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-863

Which versions are affected by CVE-2021-30533?

It affects 2 products.

Products include Fedoraproject Fedora, Google Chrome.

How do I fix CVE-2021-30533?

Upgrade to a fixed version. US federal agencies must fix it by 18 Jul 2022.

Is CVE-2021-30533 being exploited?

Yes. Attackers have exploited CVE-2021-30533 in the wild since at least 27 Jun 2022.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2024-DN70918, DEBIAN-CVE-2021-30533, GHSA-83cg-29pr-h246, UBUNTU-CVE-2021-30533.