{"affected":[{"affectedData":[{"product":"fastify-http-proxy","vendor":"fastify","versions":[{"status":"affected","version":"< 4.3.1"}]}],"source":"security-advisories@github.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:fastify-http-proxy_project:fastify-http-proxy:*:*:*:*:*:node.js:*:*","matchCriteriaId":"28A04538-96DA-4BA0-8426-63EA334430C4","versionEndExcluding":"4.3.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"fastify-http-proxy is an npm package which is a fastify plugin for proxying your http requests to another server, with hooks. By crafting a specific URL, it is possible to escape the prefix of the proxied backend service. If the base url of the proxied server is `/pub/`, a user expect that accessing `/priv` on the target service would not be possible. In affected versions, it is possible. This is fixed in version 4.3.1."},{"lang":"es","value":"fastify-http-proxy es un paquete npm que es un plugin fastify para enviar sus peticiones http a otro servidor, con hooks.&#xa0;Al diseñar una URL específica, es posible escapar el prefijo del servicio del backend proxy.&#xa0;Si la URL base del servidor proxy es \"/pub/\", un usuario espera que no sea posible acceder a \"/priv\" en el servicio objetivo.&#xa0;En versiones afectadas, es posible.&#xa0;Esto es corregido en la versión 4.3.1"}],"id":"CVE-2021-21322","lastModified":"2026-06-17T03:35:17.690","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"HIGH","cvssData":{"accessComplexity":"LOW","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"PARTIAL","baseScore":7.5,"confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","version":"2.0"},"exploitabilityScore":10.0,"impactScore":6.4,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":10.0,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"exploitabilityScore":3.9,"impactScore":5.8,"source":"security-advisories@github.com","type":"Secondary"},{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":3.9,"impactScore":5.9,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2021-03-02T04:15:12.597","references":[{"source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"],"url":"https://github.com/fastify/fastify-http-proxy/commit/02d9b43c770aa16bc44470edecfaeb7c17985016"},{"source":"security-advisories@github.com","tags":["Third Party Advisory"],"url":"https://github.com/fastify/fastify-http-proxy/security/advisories/GHSA-c4qr-gmr9-v23w"},{"source":"security-advisories@github.com","tags":["Product","Third Party Advisory"],"url":"https://www.npmjs.com/package/fastify-http-proxy"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"],"url":"https://github.com/fastify/fastify-http-proxy/commit/02d9b43c770aa16bc44470edecfaeb7c17985016"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"url":"https://github.com/fastify/fastify-http-proxy/security/advisories/GHSA-c4qr-gmr9-v23w"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Product","Third Party Advisory"],"url":"https://www.npmjs.com/package/fastify-http-proxy"}],"sourceIdentifier":"security-advisories@github.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-20"}],"source":"security-advisories@github.com","type":"Secondary"}]}