CVE-2021-21178 is a medium-severity vulnerability affecting Google Chrome on Linux and Windows prior to version 89.0.4389.72, allowing a remote attacker to spoof the Omnibox (URL bar) via a crafted HTML page due to an inappropriate implementation in Compositing. The attack requires user interaction (UI:R) but can be executed remotely (AV:N), leading to a high impact on integrity (I:H) by deceiving users about the displayed URL. While there is no known public exploit code (Metasploit, Nuclei, ExploitDB) or KEV entry, the vulnerability garnered significant community discussion and media coverage, including reports of Google fixing a related actively exploited zero-day, though this specific CVE is not listed as actively exploited.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 89.0.4389.72CPE matchmatch criteria | cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* | ||
32CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | ||
33CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.