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Fencer Vulns
medium 4.3

CVE-2021-4316 json

Inappropriate implementation in Cast UI in Google Chrome prior to 96.0.4664.45 allowed a remote attacker to spoof browser UI via a crafted…

published 2023-07-28 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-34145

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

Inappropriate implementation in Cast UI in Google Chrome prior to 96.0.4664.45 allowed a remote attacker to spoof browser UI via a crafted HTML page. (Chromium security severity: Low)

Patch / fix

  • google chrome 96.0.4664.45
  • chromium Debian 14, Debian 13, Debian 12 97.0.4692.71-0.1

debian advisories DEBIAN-CVE-2021-4316

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-4316 updated cvss 4.3

chromium-browser: Inappropriate implementation in Cast UI

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • crbug.com https://crbug.com/1152952 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected products

  • Google Chrome

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.