{
"id": "GHSA-qmw8-3v4g-gwj4",
"aliases": [
"CVE-2021-21321"
],
"details": "### Impact\n\nBy crafting a specific URL, it is possible to escape the prefix of the proxied backend service.\nIf the base url of the proxied server is `/pub/`, a user expect that accessing `/priv` on the target service would not be possible. Unfortunately, it is.\n\n[CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N)\n\n### Patches\n\nA patch have been submitted by Corey Farrell [email protected] , the reporter.\nAll releases after v4.0.2 include the fix.\n\n### Workarounds\n\nThere are no workaround available.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [fastify-reply-from](https://github.com/fastify/fastify-reply-from)\n* Email us at [[email protected] ](mailto:[email protected] )",
"summary": "Prefix escape",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.0.2"
}
]
}
],
"package": {
"name": "fastify-reply-from",
"ecosystem": "npm"
}
}
],
"modified": "2021-03-02T03:32:13Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"
}
],
"published": "2021-03-03T01:52:05Z",
"references": [
{
"url": "https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-qmw8-3v4g-gwj4",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21321",
"type": "ADVISORY"
},
{
"url": "https://github.com/fastify/fastify-reply-from/commit/dea227dda606900cc01870d08541b4dcc69d3889",
"type": "WEB"
},
{
"url": "https://www.npmjs.com/package/fastify-reply-from",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-20"
],
"severity": "CRITICAL",
"github_reviewed": true,
"nvd_published_at": "2021-03-02T04:15:00Z",
"github_reviewed_at": "2021-03-02T03:32:13Z"
}
}