Vulnerability Details CVE-2021-21321
fastify-reply-from is an npm package which is a fastify plugin to forward the current http request to another server. In fastify-reply-from before version 4.0.2, 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 4.0.2.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 62.8%
CVSS Severity
CVSS v3 Score 10.0
CVSS v2 Score 7.5
References
- https://github.com/fastify/fastify-reply-from/commit/dea227dda606900cc01870d08541b4dcc69d3889
- https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-qmw8-3v4g-gwj4
- https://www.npmjs.com/package/fastify-reply-from
- https://github.com/fastify/fastify-reply-from/commit/dea227dda606900cc01870d08541b4dcc69d3889
- https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-qmw8-3v4g-gwj4
- https://www.npmjs.com/package/fastify-reply-from
Products affected by CVE-2021-21321
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.1.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.2.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.3.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.4.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.4.1
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.4.3
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.4.4
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.4.5
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.4.6
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.5.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.5.2
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.5.3
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.5.4
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.6.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.6.1
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:0.6.2
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:1.0.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:1.1.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:2.0.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:2.0.1
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:2.2.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:3.0.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:3.1.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:3.1.1
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:3.1.2
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:3.1.3
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:3.1.4
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:3.2.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:3.3.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:3.4.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:3.5.0
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cpe:2.3:a:fastify-reply-from_project:fastify-reply-from:4.0.0