CVE-2021-43783

{"containers": {"cna": {"affected": [{"product": "backstage", "vendor": "backstage", "versions": [{"status": "affected", "version": "< 0.15.14"}]}], "descriptions": [{"lang": "en", "value": "@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-11-29T19:20:09.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"}], "source": {"advisory": "GHSA-mg3m-f475-28hv", "discovery": "UNKNOWN"}, "title": "Path Traversal in @backstage/plugin-scaffolder-backend", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-43783", "STATE": "PUBLIC", "TITLE": "Path Traversal in @backstage/plugin-scaffolder-backend"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "backstage", "version": {"version_data": [{"version_value": "< 0.15.14"}]}}]}, "vendor_name": "backstage"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. 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This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates."}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"}]}]}, "references": {"reference_data": [{"name": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv", "refsource": "CONFIRM", "url": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv"}, {"name": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f", "refsource": "MISC", "url": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"}]}, "source": {"advisory": "GHSA-mg3m-f475-28hv", "discovery": "UNKNOWN"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T04:03:08.643Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"}]}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2021-43783", "datePublished": "2021-11-29T19:20:09.000Z", "dateReserved": "2021-11-16T00:00:00.000Z", "dateUpdated": "2024-08-04T04:03:08.643Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "backstage", "vendor": "backstage", "versions": [{"status": "affected", "version": "< 0.15.14"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*", "matchCriteriaId": "3983C003-B182-4718-9390-D862FBF9687A", "versionEndExcluding": "0.15.14", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates."}, {"lang": "es", "value": "backstage/plugin-scaffolder-backend es el backend para las plantillas de software Backstage por defecto. En las versiones afectadas, un actor malicioso con acceso de escritura a una plantilla de scaffolder registrada es capaz de manipular la plantilla de manera que escriba archivos en rutas arbitrarias en la instancia del host de scaffolder-backend. Esta vulnerabilidad tambi\u00e9n puede ser explotada en alguna situaci\u00f3n mediante la entrada del usuario cuando se ejecuta una plantilla, lo que significa que no se necesita acceso de escritura a las plantillas. Sin embargo, este m\u00e9todo no permitir\u00e1 al atacante controlar el contenido del archivo inyectado, a menos que la plantilla tambi\u00e9n est\u00e9 dise\u00f1ada de una forma espec\u00edfica que permita controlar el contenido del archivo. Esta vulnerabilidad ha sido corregida en la versi\u00f3n \"0.15.14\" del \"@backstage/plugin-scaffolder-backend\". Este ataque es mitigado restringiendo el acceso y requiriendo revisiones cuando son registradas o modifican las plantillas de scaffolder"}], "id": "CVE-2021-43783", "lastModified": "2026-06-17T04:11:25.860", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 5.5, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 4.7, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 4.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-11-29T20:15:08.077", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-22"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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