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No exploitation reportedFix available

CVE-2021-30558

No exploitation reported by the sources we read.

  • Published2023-01-02
  • Fixed in91.0.4472.77

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 content security policy in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chrome security severity: Medium)

Timeline

dates in UTC
  1. 2023-01-0223:15CVE publishedNVD

Versions per branch

NVD · CISA-ADP
Google chrome
BranchAffectedFixed in
91.0< 91.0.4472.7791.0.4472.77

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

Products declared by the CNA1 product

As Chrome, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Google Chrome
    Affected
    • < 91.0.4472.77fixed in 91.0.4472.77custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-02-20

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

  • chromiumDebian:14all versions · fixed in 93.0.4577.82-1
  • chromiumDebian:13all versions · fixed in 93.0.4577.82-1
  • chromiumDebian:12all versions · fixed in 93.0.4577.82-1
  • chromiumDebian:11all versions · fixed in 97.0.4692.71-0.1~deb11u1
  • chromium-browserUbuntu:18.04:LTSall versions · fixed in 91.0.4472.77-0ubuntu0.18.04.1

Vendor advisories

  • CVE-2021-30558 Red Hat Product Security

    chromium-browser: Insufficient policy enforcement in content security policy

Full record on NVD

Fix

  1. Update Google chrome to 91.0.4472.77

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:H
Published
2023-01-02
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-m242-6h46-jfw3

Frequently asked questions

What is CVE-2021-30558?

Insufficient policy enforcement in content security policy in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chrome security severity: Medium)

Is CVE-2021-30558 actively exploited?

Active exploitation of CVE-2021-30558 has not been confirmed. Its EPSS score was 11.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-30558?

CVE-2021-30558 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Sources for this record