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No exploitation reportedFix available

CVE-2021-21172

No exploitation reported by the sources we read.

  • Published2021-03-09

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Insufficient policy enforcement in File System API in Google Chrome on Windows prior to 89.0.4389.72 allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page.

Timeline

dates in UTC
  1. 2021-03-0918:15CVE publishedNVD

Versions per branch

NVD
Fedoraproject fedora
BranchAffectedFixed in
32.x= 32no fix published
33.x= 33no fix published
34.x= 34no fix published
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
Google chromeversion to verify
BranchAffectedFixed in
89.0< 89.0.4389.7289.0.4389.72

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • chromiumSUSE:Package Hub 15 SP2all versions · fixed in 89.0.4389.72-bp152.2.62.1
  • chromiumopenSUSE:Tumbleweedall versions · fixed in 93.0.4577.82-1.1
  • chromiumopenSUSE:Tumbleweedall versions · fixed in 113.0.5672.92-1.1
  • chromiumopenSUSE:Leap 15.2all versions · fixed in 89.0.4389.72-lp152.2.77.1
  • chromiumDebian:14all versions · fixed in 89.0.4389.82-1
  • chromiumDebian:13all versions · fixed in 89.0.4389.82-1
  • chromiumDebian:12all versions · fixed in 89.0.4389.82-1
  • chromiumDebian:10all versions · fixed in 89.0.4389.114-1~deb10u1

27 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-21172 Red Hat Product Security

    chromium-browser: Insufficient policy enforcement in File System API

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Published
2021-03-09
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-mc2v-pp94-p8j7

Frequently asked questions

What is CVE-2021-21172?

Insufficient policy enforcement in File System API in Google Chrome on Windows prior to 89.0.4389.72 allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page.

Is CVE-2021-21172 actively exploited?

Active exploitation of CVE-2021-21172 has not been confirmed. Its EPSS score was 1.7% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-21172?

CVE-2021-21172 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

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Sources for this record