CVE-2021-43842

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Wiki.js version 2.5.260 is the first production version to contain a patch. Version 2.5.258 is the first development build to contain a patch and is available only as a Docker image as requarks/wiki:canary-2.5.258."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-12-20T22:30:11.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Requarks/wiki/security/advisories/GHSA-3qv4-gp35-rgh7"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/Requarks/wiki/commit/5d3e81496fba1f0fbd64eeb855f30f69a9040718"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/Requarks/wiki/releases/tag/2.5.260"}], "source": {"advisory": "GHSA-3qv4-gp35-rgh7", "discovery": "UNKNOWN"}, "title": "Stored XSS via SVG file upload in Wiki.js", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-43842", "STATE": "PUBLIC", "TITLE": "Stored XSS via SVG file upload in Wiki.js"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "wiki", "version": {"version_data": [{"version_value": "< 2.5.258 (development)"}, {"version_value": "< 2.5.260 (production)"}]}}]}, "vendor_name": "Requarks"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Wiki.js is a wiki app built on Node.js. Wiki.js versions 2.5.257 and earlier are vulnerable to stored cross-site scripting through a SVG file upload. By creating a crafted SVG file, a malicious Wiki.js user may stage a stored cross-site scripting attack. This allows the attacker to execute malicious JavaScript when the SVG is viewed directly by other users. Scripts do not execute when loaded inside a page via normal `<img>` tags. Commit 5d3e81496fba1f0fbd64eeb855f30f69a9040718 fixes this vulnerability by adding an optional (enabled by default) SVG sanitization step to all file uploads that match the SVG mime type. As a workaround, disable file upload for all non-trusted users. Wiki.js version 2.5.260 is the first production version to contain a patch. 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{"affected": [{"affectedData": [{"product": "wiki", "vendor": "Requarks", "versions": [{"status": "affected", "version": "< 2.5.258 (development)"}, {"status": "affected", "version": "< 2.5.260 (production)"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:requarks:wiki.js:*:*:*:*:*:*:*:*", "matchCriteriaId": "E5060EB4-DBED-4595-9558-FDEC56ABB41A", "versionEndIncluding": "2.5.257", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Wiki.js is a wiki app built on Node.js. Wiki.js versions 2.5.257 and earlier are vulnerable to stored cross-site scripting through a SVG file upload. By creating a crafted SVG file, a malicious Wiki.js user may stage a stored cross-site scripting attack. This allows the attacker to execute malicious JavaScript when the SVG is viewed directly by other users. Scripts do not execute when loaded inside a page via normal `<img>` tags. Commit 5d3e81496fba1f0fbd64eeb855f30f69a9040718 fixes this vulnerability by adding an optional (enabled by default) SVG sanitization step to all file uploads that match the SVG mime type. As a workaround, disable file upload for all non-trusted users. Wiki.js version 2.5.260 is the first production version to contain a patch. Version 2.5.258 is the first development build to contain a patch and is available only as a Docker image as requarks/wiki:canary-2.5.258."}, {"lang": "es", "value": "Wiki.js es una aplicaci\u00f3n wiki construida sobre Node.js. Wiki.js versiones 2.5.257 y anteriores, son vulnerables a un ataque de tipo cross-site scripting almacenado mediante la carga de un archivo SVG. Al crear un archivo SVG dise\u00f1ado, un usuario malicioso de Wiki.js puede realizar un ataque de tipo cross-site scripting almacenado. Esto permite al atacante ejecutar JavaScript malicioso cuando el SVG es visto directamente por otros usuarios. Los scripts no son ejecutados cuando son cargados dentro de una p\u00e1gina por medio de etiquetas \"(img)\" normales. El commit 5d3e81496fba1f0fbd64eeb855f30f69a9040718 corrige esta vulnerabilidad al a\u00f1adir un paso opcional (habilitado por defecto) de saneo de SVG a todas las cargas de archivos que coincidan con el tipo mime de SVG. Como soluci\u00f3n, deshabilite la carga de archivos para todos los usuarios que no sean confiables. La versi\u00f3n 2.5.260 de Wiki.js es la primera versi\u00f3n de producci\u00f3n que contiene un parche. La versi\u00f3n 2.5.258 es la primera versi\u00f3n de desarrollo que contiene un parche y est\u00e1 disponible s\u00f3lo como imagen Docker como requarks/wiki:canary-2.5.258"}], "id": "CVE-2021-43842", "lastModified": "2026-06-17T04:11:33.150", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 3.5, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 6.8, "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": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2021-12-20T23:15:29.300", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/Requarks/wiki/commit/5d3e81496fba1f0fbd64eeb855f30f69a9040718"}, {"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/Requarks/wiki/releases/tag/2.5.260"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/Requarks/wiki/security/advisories/GHSA-3qv4-gp35-rgh7"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/Requarks/wiki/commit/5d3e81496fba1f0fbd64eeb855f30f69a9040718"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/Requarks/wiki/releases/tag/2.5.260"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/Requarks/wiki/security/advisories/GHSA-3qv4-gp35-rgh7"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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