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CVE-2021-38000

60
FAUCET Score

CVE-2021-38000 is a critical vulnerability in Google Chrome on Android, affecting versions prior to 95.0.4638.69, as well as Debian and Fedora. It stems from insufficient validation of untrusted input in Intents, allowing a remote attacker to redirect users to malicious URLs via a crafted HTML page. Rated 6.1 MEDIUM on CVSS, this vulnerability has a low attack complexity and requires user interaction, but can lead to information disclosure and data integrity issues. Its FAUCET Risk Score of 97/100 and EPSS score of 0.031950000 indicate a significant threat. This CVE is actively exploited in the wild, as confirmed by its presence in the KEV catalog and extensive media coverage, including reports of its use in Predator spyware attacks. While no public exploit code is available via Metasploit, Nuclei, or ExploitDB, it has garnered substantial community discussion, indicating high awareness.

Impacted Technologies

VendorProductVersion(s)CPE
< 95.0.4638.69CPE 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

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.49%
Probability of exploitation in next 30 days
EPSS Percentile
90.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Nov 3, 2021
This CVE's current EPSS score of 0.0449 is in the 96th percentile among its peer group of 26,234 CVEs.

Social Chatter

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.

Media Mentions

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

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia msrc
Product: Microsoft Edge (Chromium-based)Fixed in: 95.0.1020.40

Vendor Advisories (1)

microsoft2021-Oct/CVE-2021-38000

Chromium: CVE-2021-38000 Insufficient validation of untrusted input in Intents

Oct 12, 2021

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
chromereleases.googleblog.com / 2021/10/stable-channel-update-for-desktop_28.html
Release Notes
crbug.com / 1249962
ExploitIssue Tracking
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/3W46HRT2UVHWSLZB6JZHQF6JNQWKV744
Release Notes
debian.org / security/2022/dsa-5046
Mailing ListThird Party Advisory