gsd-2021-26540
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the hostnames set by the "allowedIframeHostnames" option when the "allowIframeRelativeUrls" is set to true, which allows attackers to bypass hostname whitelist for iframe element, related using an src value that starts with "/\\example.com".
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-26540",
"description": "Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the hostnames set by the \"allowedIframeHostnames\" option when the \"allowIframeRelativeUrls\" is set to true, which allows attackers to bypass hostname whitelist for iframe element, related using an src value that starts with \"/\\\\example.com\".",
"id": "GSD-2021-26540",
"references": [
"https://access.redhat.com/errata/RHSA-2021:3759",
"https://access.redhat.com/errata/RHSA-2021:2438"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-26540"
],
"details": "Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the hostnames set by the \"allowedIframeHostnames\" option when the \"allowIframeRelativeUrls\" is set to true, which allows attackers to bypass hostname whitelist for iframe element, related using an src value that starts with \"/\\\\example.com\".",
"id": "GSD-2021-26540",
"modified": "2023-12-13T01:23:33.347763Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
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"CVE_data_meta": {
"ASSIGNER": "cve@mitre.org",
"ID": "CVE-2021-26540",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "n/a",
"version": {
"version_data": [
{
"version_value": "n/a"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
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"data_type": "CVE",
"data_version": "4.0",
"description": {
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"lang": "eng",
"value": "Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the hostnames set by the \"allowedIframeHostnames\" option when the \"allowIframeRelativeUrls\" is set to true, which allows attackers to bypass hostname whitelist for iframe element, related using an src value that starts with \"/\\\\example.com\"."
}
]
},
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"references": {
"reference_data": [
{
"name": "https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26",
"refsource": "MISC",
"url": "https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26"
},
{
"name": "https://github.com/apostrophecms/sanitize-html/pull/460",
"refsource": "MISC",
"url": "https://github.com/apostrophecms/sanitize-html/pull/460"
},
{
"name": "https://advisory.checkmarx.net/advisory/CX-2021-4309",
"refsource": "MISC",
"url": "https://advisory.checkmarx.net/advisory/CX-2021-4309"
}
]
}
},
"gitlab.com": {
"advisories": [
{
"affected_range": "\u003c2.3.2",
"affected_versions": "All versions before 2.3.2",
"cvss_v2": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
"cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"cwe_ids": [
"CWE-1035",
"CWE-937"
],
"date": "2021-04-01",
"description": "sanitize-html does not properly validate the hostnames set by the `allowedIframeHostnames` option when the `allowIframeRelativeUrls` is set to true, which allows attackers to bypass the hostname allow list for an iframe element.",
"fixed_versions": [
"2.3.2"
],
"identifier": "CVE-2021-26540",
"identifiers": [
"CVE-2021-26540"
],
"not_impacted": "All versions starting from 2.3.2",
"package_slug": "npm/sanitize-html",
"pubdate": "2021-02-08",
"solution": "Upgrade to version 2.3.2 or above.",
"title": "Origin Validation Error",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2021-26540"
],
"uuid": "1e00e846-7301-49bb-8b74-007e58885922"
}
]
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
"nodes": [
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:a:apostrophecms:sanitize-html:*:*:*:*:*:node.js:*:*",
"cpe_name": [],
"versionEndExcluding": "2.3.2",
"vulnerable": true
}
],
"operator": "OR"
}
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"ID": "CVE-2021-26540"
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}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26",
"refsource": "MISC",
"tags": [
"Release Notes",
"Third Party Advisory"
],
"url": "https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26"
},
{
"name": "https://github.com/apostrophecms/sanitize-html/pull/460",
"refsource": "MISC",
"tags": [
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],
"url": "https://github.com/apostrophecms/sanitize-html/pull/460"
},
{
"name": "https://advisory.checkmarx.net/advisory/CX-2021-4309",
"refsource": "MISC",
"tags": [
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"Patch",
"Third Party Advisory"
],
"url": "https://advisory.checkmarx.net/advisory/CX-2021-4309"
}
]
}
},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
},
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4
}
},
"lastModifiedDate": "2021-04-01T15:02Z",
"publishedDate": "2021-02-08T17:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.