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vuln-cve/data/2021/21xxx/CVE-2021-21391.json
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{
"containers": {
"cna": {
"affected": [
{
"product": "ckeditor5",
"vendor": "ckeditor",
"versions": [
{
"status": "affected",
"version": "< 27.0.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "CKEditor 5 provides a WYSIWYG editing solution. This CVE affects the following npm packages: ckeditor5-engine, ckeditor5-font, ckeditor5-image, ckeditor5-list, ckeditor5-markdown-gfm, ckeditor5-media-embed, ckeditor5-paste-from-office, and ckeditor5-widget. Following an internal audit, a regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version <= 26.0.0. The problem has been recognized and patched. The fix will be available in version 27.0.0."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-04-29T00:20:19.000Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-markdown-gfm"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-3rh3-wfr4-76mj"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-engine"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-font"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-image"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-list"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-media-embed"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-paste-from-office"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-widget"
}
],
"source": {
"advisory": "GHSA-3rh3-wfr4-76mj",
"discovery": "UNKNOWN"
},
"title": "Regular expression Denial of Service in multiple packages",
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security-advisories@github.com",
"ID": "CVE-2021-21391",
"STATE": "PUBLIC",
"TITLE": "Regular expression Denial of Service in multiple packages"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "ckeditor5",
"version": {
"version_data": [
{
"version_value": "< 27.0.0"
}
]
}
}
]
},
"vendor_name": "ckeditor"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "CKEditor 5 provides a WYSIWYG editing solution. This CVE affects the following npm packages: ckeditor5-engine, ckeditor5-font, ckeditor5-image, ckeditor5-list, ckeditor5-markdown-gfm, ckeditor5-media-embed, ckeditor5-paste-from-office, and ckeditor5-widget. Following an internal audit, a regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version <= 26.0.0. The problem has been recognized and patched. The fix will be available in version 27.0.0."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-400: Uncontrolled Resource Consumption"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.npmjs.com/package/@ckeditor/ckeditor5-markdown-gfm",
"refsource": "MISC",
"url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-markdown-gfm"
},
{
"name": "https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-3rh3-wfr4-76mj",
"refsource": "CONFIRM",
"url": "https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-3rh3-wfr4-76mj"
},
{
"name": "https://www.npmjs.com/package/@ckeditor/ckeditor5-engine",
"refsource": "MISC",
"url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-engine"
},
{
"name": "https://www.npmjs.com/package/@ckeditor/ckeditor5-font",
"refsource": "MISC",
"url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-font"
},
{
"name": "https://www.npmjs.com/package/@ckeditor/ckeditor5-image",
"refsource": "MISC",
"url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-image"
},
{
"name": "https://www.npmjs.com/package/@ckeditor/ckeditor5-list",
"refsource": "MISC",
"url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-list"
},
{
"name": "https://www.npmjs.com/package/@ckeditor/ckeditor5-media-embed",
"refsource": "MISC",
"url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-media-embed"
},
{
"name": "https://www.npmjs.com/package/@ckeditor/ckeditor5-paste-from-office",
"refsource": "MISC",
"url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-paste-from-office"
},
{
"name": "https://www.npmjs.com/package/@ckeditor/ckeditor5-widget",
"refsource": "MISC",
"url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-widget"
}
]
},
"source": {
"advisory": "GHSA-3rh3-wfr4-76mj",
"discovery": "UNKNOWN"
}
}
},
"adp": [
{
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2024-08-03T18:09:15.938Z"
},
"title": "CVE Program Container",
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-markdown-gfm"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-3rh3-wfr4-76mj"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-engine"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-font"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-image"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-list"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-media-embed"
},
{
"tags": [
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"x_transferred"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-paste-from-office"
},
{
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"x_transferred"
],
"url": "https://www.npmjs.com/package/%40ckeditor/ckeditor5-widget"
}
]
}
]
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2021-21391",
"datePublished": "2021-04-29T00:20:19.000Z",
"dateReserved": "2020-12-22T00:00:00.000Z",
"dateUpdated": "2024-08-03T18:09:15.938Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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