FKIE_CVE-2021-21228
Vulnerability from fkie_nvd - Published: 2021-04-30 21:15 - Updated: 2026-06-17 03:35
Severity
Summary
Insufficient policy enforcement in extensions in Google Chrome prior to 90.0.4430.93 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a crafted Chrome Extension.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| chrome | * | ||
| debian | debian_linux | 10.0 | |
| fedoraproject | fedora | 32 | |
| fedoraproject | fedora | 33 | |
| fedoraproject | fedora | 34 |
{
"affected": [
{
"affectedData": [
{
"product": "Chrome",
"vendor": "Google",
"versions": [
{
"lessThan": "90.0.4430.93",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"source": "chrome-cve-admin@google.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4DDD2401-6267-4B1E-BA94-6D79037D5E42",
"versionEndExcluding": "90.0.4430.93",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
"matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Insufficient policy enforcement in extensions in Google Chrome prior to 90.0.4430.93 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a crafted Chrome Extension."
},
{
"lang": "es",
"value": "La aplicaci\u00f3n de pol\u00edticas insuficiente en extensions de Google Chrome versiones anteriores a 90.0.4430.93, permit\u00eda a un atacante que convenci\u00f3 a un usuario de instalar una extensi\u00f3n maliciosa para omitir restricciones de navegaci\u00f3n por medio de una Chrome Extension dise\u00f1ada."
}
],
"id": "CVE-2021-21228",
"lastModified": "2026-06-17T03:35:04.933",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": true
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 1.4,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-04-30T21:15:08.417",
"references": [
{
"source": "chrome-cve-admin@google.com",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_26.html"
},
{
"source": "chrome-cve-admin@google.com",
"tags": [
"Broken Link",
"Vendor Advisory"
],
"url": "https://crbug.com/1139156"
},
{
"source": "chrome-cve-admin@google.com",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/"
},
{
"source": "chrome-cve-admin@google.com",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/"
},
{
"source": "chrome-cve-admin@google.com",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/"
},
{
"source": "chrome-cve-admin@google.com",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202104-08"
},
{
"source": "chrome-cve-admin@google.com",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4911"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_26.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Broken Link",
"Vendor Advisory"
],
"url": "https://crbug.com/1139156"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202104-08"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4911"
}
],
"sourceIdentifier": "chrome-cve-admin@google.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-863"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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