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CVE-2021-38017

28
FAUCET Score

CVE-2021-38017 describes an insufficient policy enforcement vulnerability in Google Chrome prior to version 96.0.4664.45, impacting various Debian and Fedora distributions. This high-severity vulnerability (CVSS 8.8) allows a remote attacker to bypass iframe sandbox navigation restrictions through a crafted HTML page, potentially leading to high confidentiality, integrity, and availability impacts. While there is no evidence of active exploitation or publicly available exploit code in Metasploit, Nuclei, or ExploitDB, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 96.0.4664.45CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.80%
Probability of exploitation in next 30 days
EPSS Percentile
53.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0080 is in the 55th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: Microsoft Edge (Chromium-based)Fixed in: 96.0 1954.29
googlevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2021-Nov/CVE-2021-38017

Chromium: CVE-2021-38017 Insufficient policy enforcement in iframe sandbox

Nov 9, 2021

References

chromereleases.googleblog.com / 2021/11/stable-channel-update-for-desktop.html
Vendor Advisory
crbug.com / 1256822
Permissions Required
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/3W46HRT2UVHWSLZB6JZHQF6JNQWKV744
debian.org / security/2022/dsa-5046
Third Party Advisory