CVE-2022-21169 - Vulnerability Details - OpenCVE

The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact partial

Vendors	Products
Express Xss Sanitizer Project	Express Xss Sanitizer

Configuration 1 [-]

cpe:2.3:a:express_xss_sanitizer_project:express_xss_sanitizer:*:*:*:*:*:node.js:*:*

No data.

References

Link	Providers
https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a
https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4
https://runkit.com/embed/w306l6zfm7tu
https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443

History

Wed, 21 May 2025 21:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: snyk

Published: 2022-09-26T05:05:11.200Z

Updated: 2025-05-21T20:29:25.084Z

Reserved: 2022-02-24T00:00:00.000Z

Link: CVE-2022-21169

Vulnrichment

Updated: 2024-08-03T02:31:59.240Z

NVD

Status : Modified

Published: 2022-09-26T05:15:10.133

Modified: 2025-05-21T21:15:55.157

Link: CVE-2022-21169

Redhat

No data.

{"containers": {"cna": {"affected": [{"product": "express-xss-sanitizer", "vendor": "n/a", "versions": [{"lessThan": "1.1.3", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "Jayateertha Guruprasad"}], "datePublic": "2022-09-26T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "exploitCodeMaturity": "PROOF_OF_CONCEPT", "integrityImpact": "LOW", "privilegesRequired": "NONE", "remediationLevel": "NOT_DEFINED", "reportConfidence": "NOT_DEFINED", "scope": "UNCHANGED", "temporalScore": 6.9, "temporalSeverity": "MEDIUM", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"description": "Prototype Pollution", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2022-09-26T05:05:11.000Z", "orgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730", "shortName": "snyk"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"}, {"tags": ["x_refsource_MISC"], "url": "https://runkit.com/embed/w306l6zfm7tu"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"}], "title": "Prototype Pollution", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "report@snyk.io", "DATE_PUBLIC": "2022-09-26T05:00:10.103193Z", "ID": "CVE-2022-21169", "STATE": "PUBLIC", "TITLE": "Prototype Pollution"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "express-xss-sanitizer", "version": {"version_data": [{"version_affected": "<", "version_value": "1.1.3"}]}}]}, "vendor_name": "n/a"}]}}, "credit": [{"lang": "eng", "value": "Jayateertha Guruprasad"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization."}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Prototype Pollution"}]}]}, "references": {"reference_data": [{"name": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443", "refsource": "MISC", "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"}, {"name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4", "refsource": "MISC", "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"}, {"name": "https://runkit.com/embed/w306l6zfm7tu", "refsource": "MISC", "url": "https://runkit.com/embed/w306l6zfm7tu"}, {"name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a", "refsource": "MISC", "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T02:31:59.240Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://runkit.com/embed/w306l6zfm7tu"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"}]}, {"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-1321", "lang": "en", "description": "CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-05-21T20:29:10.261035Z", "id": "CVE-2022-21169", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-05-21T20:29:25.084Z"}}]}, "cveMetadata": {"assignerOrgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730", "assignerShortName": "snyk", "cveId": "CVE-2022-21169", "datePublished": "2022-09-26T05:05:11.200Z", "dateReserved": "2022-02-24T00:00:00.000Z", "dateUpdated": "2025-05-21T20:29:25.084Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443", "tags": ["x_refsource_MISC", "x_transferred"]}, {"url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4", "tags": ["x_refsource_MISC", "x_transferred"]}, {"url": "https://runkit.com/embed/w306l6zfm7tu", "tags": ["x_refsource_MISC", "x_transferred"]}, {"url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a", "tags": ["x_refsource_MISC", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T02:31:59.240Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-21169", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-05-21T20:29:10.261035Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1321", "description": "CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-05-21T20:29:20.928Z"}}], "cna": {"title": "Prototype Pollution", "credits": [{"lang": "en", "value": "Jayateertha Guruprasad"}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P", "temporalScore": 6.9, "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "remediationLevel": "NOT_DEFINED", "reportConfidence": "NOT_DEFINED", "temporalSeverity": "MEDIUM", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "exploitCodeMaturity": "PROOF_OF_CONCEPT", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "n/a", "product": "express-xss-sanitizer", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "1.1.3", "versionType": "custom"}]}], "datePublic": "2022-09-26T00:00:00.000Z", "references": [{"url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4", "tags": ["x_refsource_MISC"]}, {"url": "https://runkit.com/embed/w306l6zfm7tu", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "text", "description": "Prototype Pollution"}]}], "providerMetadata": {"orgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730", "shortName": "snyk", "dateUpdated": "2022-09-26T05:05:11.000Z"}, "x_legacyV4Record": {"credit": [{"lang": "eng", "value": "Jayateertha Guruprasad"}], "impact": {"cvss": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"version_value": "1.1.3", "version_affected": "<"}]}, "product_name": "express-xss-sanitizer"}]}, "vendor_name": "n/a"}]}}, "data_type": "CVE", "references": {"reference_data": [{"url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443", "name": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443", "refsource": "MISC"}, {"url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4", "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4", "refsource": "MISC"}, {"url": "https://runkit.com/embed/w306l6zfm7tu", "name": "https://runkit.com/embed/w306l6zfm7tu", "refsource": "MISC"}, {"url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a", "name": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a", "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Prototype Pollution"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2022-21169", "STATE": "PUBLIC", "TITLE": "Prototype Pollution", "ASSIGNER": "report@snyk.io", "DATE_PUBLIC": "2022-09-26T05:00:10.103193Z"}}}}, "cveMetadata": {"cveId": "CVE-2022-21169", "state": "PUBLISHED", "dateUpdated": "2025-05-21T20:29:25.084Z", "dateReserved": "2022-02-24T00:00:00.000Z", "assignerOrgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730", "datePublished": "2022-09-26T05:05:11.200Z", "assignerShortName": "snyk"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:express_xss_sanitizer_project:express_xss_sanitizer:*:*:*:*:*:node.js:*:*", "matchCriteriaId": "5A82E346-B772-4081-BD07-2911862E9945", "versionEndExcluding": "1.1.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization."}, {"lang": "es", "value": "El paquete express-xss-sanitizer versiones anteriores a 1.1.3, es vulnerable a una Contaminaci\u00f3n de Prototipos por medio del atributo allowedTags, permitiendo al atacante omitir el saneo de tipo xss."}], "id": "CVE-2022-21169", "lastModified": "2025-05-21T21:15:55.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "report@snyk.io", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-09-26T05:15:10.133", "references": [{"source": "report@snyk.io", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"}, {"source": "report@snyk.io", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"}, {"source": "report@snyk.io", "tags": ["Patch", "Third Party Advisory", "URL Repurposed"], "url": "https://runkit.com/embed/w306l6zfm7tu"}, {"source": "report@snyk.io", "tags": ["Exploit", "Third Party Advisory"], "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory", "URL Repurposed"], "url": "https://runkit.com/embed/w306l6zfm7tu"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443"}], "sourceIdentifier": "report@snyk.io", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1321"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-1321"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}