Vulnerability in Google Chrome
CVE-2021-21111
Insufficient policy enforcement in WebUI in Google Chrome prior to 87.0.4280.141 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (63.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Google Chrome — versions unspecified
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 32, 33
Weakness classification (CWE)
References
- chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop.html (Release Notes, Vendor Advisory)
- crbug.com/1149125 (Permissions Required, Vendor Advisory)
- security.gentoo.org/glsa/202101-05 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2021/dsa-4832 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2021-21111?
- CVE-2021-21111 is a critical-severity vulnerability in Google Chrome, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 9.6/10. Published 2021-01-08.
- How severe is CVE-2021-21111?
- Critical severity. CVSS v3 base score is 9.6 out of 10.