{"id":"CVE-2023-28433","aliases":["EUVD-2023-2606","GHSA-w23q-4hw3-2pp6"],"status":"published","title":"Minio Privilege Escalation on Windows via Path separator manipulation","description":"Minio is a Multi-Cloud Object Storage framework. All users on Windows prior to version RELEASE.2023-03-20T20-16-18Z are impacted. MinIO fails to filter the `\\` character, which allows for arbitrary object placement across buckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user. This issue is patched in RELEASE.2023-03-20T20-16-18Z. There are no known workarounds.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00981,"percentile":0.62547,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-668"],"published":"2023-03-22T20:33:43Z","modified":"2026-10-28T02:31:06Z","fixes":[{"ecosystem":"Go","package":"github.com/minio/minio","fixed_in":["0.0.0-202303200735"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/minio/minio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.0-202303200735"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/minio/minio","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.0-202303200735"}]}]}],"products":[{"vendor":"minio","product":"minio"}],"references":[{"url":"https://github.com/minio/minio/security/advisories/GHSA-w23q-4hw3-2pp6","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://github.com/minio/minio/commit/8d6558b23649f613414c8527b58973fbdfa4d1b8","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://github.com/minio/minio/commit/b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://github.com/minio/minio/releases/tag/RELEASE.2023-03-20T20-16-18Z","tags":["x_refsource_MISC","x_transferred","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28433","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-w23q-4hw3-2pp6"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28433.json","tags":["advisory"]},{"url":"https://github.com/minio/minio","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-28433","title":"Minio Privilege Escalation on Windows via Path separator manipulation","description":"Minio is a Multi-Cloud Object Storage framework. All users on Windows prior to version RELEASE.2023-03-20T20-16-18Z are impacted. MinIO fails to filter the `\\` character, which allows for arbitrary object placement across buckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user. This issue is patched in RELEASE.2023-03-20T20-16-18Z. There are no known workarounds.","status":"published","published":"2023-03-22T20:33:43.452Z","modified":"2025-02-25T14:51:18.769Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:35:32.752775Z"}],"euvd":[{"id":"EUVD-2023-2606","description":"Minio is a Multi-Cloud Object Storage framework. All users on Windows prior to version RELEASE.2023-03-20T20-16-18Z are impacted. MinIO fails to filter the `\\` character, which allows for arbitrary object placement across buckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user. This issue is patched in RELEASE.2023-03-20T20-16-18Z. There are no known workarounds.","status":"published","published":"2023-03-22T20:33:43Z","modified":"2025-02-25T14:51:18Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:53:24.646946Z"}],"ghsa":[{"id":"GHSA-w23q-4hw3-2pp6","title":"Minio vulnerable to Privilege Escalation on Windows via Path separator manipulation","description":"### Impact\nAll users on Windows are impacted. MinIO fails to filter the `\\` character, which allows for arbitrary object placement across\nbuckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user.\n\n### Patches\nThere are two patches that fix this problem comprehensively\n\n```\ncommit b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc\nAuthor: Harshavardhana \u003charsha@minio.io\u003e\nDate:   Mon Mar 20 13:16:00 2023 -0700\n\n    reject object names with '\\' on windows (#16856)\n```\n\n```\ncommit 8d6558b23649f613414c8527b58973fbdfa4d1b8\nAuthor: Harshavardhana \u003charsha@minio.io\u003e\nDate:   Mon Mar 20 00:35:25 2023 -0700\n\n    fix: convert '\\' to '/' on windows (#16852)\n```\n\n### Workarounds\nThere are no known workarounds\n\n### References\nThe vulnerable code:\n```go\n// minio/cmd/generic-handlers.go\n// Check if the incoming path has bad path components,\n// such as \"..\" and \".\"\n// SlashSeparator -\u003e /\n// dotdotComponent -\u003e ..\n// dotComponent -\u003e .\nfunc hasBadPathComponent(path string) bool {\n  path = strings.TrimSpace(path)\n  for _, p := range strings.Split(path, SlashSeparator) {\n    switch strings.TrimSpace(p) {\n    case dotdotComponent:\n      return true\n    case dotComponent:\n      return true\n    }\n  }\n  return false\n}\n```\n","status":"published","published":"2023-09-06T18:43:13Z","modified":"2023-09-06T18:43:15Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:37:02.632342Z"}],"nvd":[{"id":"CVE-2023-28433","description":"Minio is a Multi-Cloud Object Storage framework. All users on Windows prior to version RELEASE.2023-03-20T20-16-18Z are impacted. MinIO fails to filter the `\\` character, which allows for arbitrary object placement across buckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user. This issue is patched in RELEASE.2023-03-20T20-16-18Z. There are no known workarounds.","status":"published","published":"2023-03-22T21:15:18.34Z","modified":"2026-06-17T05:47:42.33Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:07:50.908252Z"}],"osv":[{"id":"CVE-2023-28433","title":"Minio Privilege Escalation on Windows via Path separator manipulation","description":"Minio is a Multi-Cloud Object Storage framework. All users on Windows prior to version RELEASE.2023-03-20T20-16-18Z are impacted. MinIO fails to filter the `\\` character, which allows for arbitrary object placement across buckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user. This issue is patched in RELEASE.2023-03-20T20-16-18Z. There are no known workarounds.","status":"published","published":"2023-03-22T20:33:43.452Z","modified":"2026-10-28T02:31:06.928796624Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T15:44:31.468318Z"},{"id":"GHSA-w23q-4hw3-2pp6","title":"Minio vulnerable to Privilege Escalation on Windows via Path separator manipulation","description":"### Impact\nAll users on Windows are impacted. MinIO fails to filter the `\\` character, which allows for arbitrary object placement across\nbuckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user.\n\n### Patches\nThere are two patches that fix this problem comprehensively\n\n```\ncommit b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc\nAuthor: Harshavardhana \u003charsha@minio.io\u003e\nDate:   Mon Mar 20 13:16:00 2023 -0700\n\n    reject object names with '\\' on windows (#16856)\n```\n\n```\ncommit 8d6558b23649f613414c8527b58973fbdfa4d1b8\nAuthor: Harshavardhana \u003charsha@minio.io\u003e\nDate:   Mon Mar 20 00:35:25 2023 -0700\n\n    fix: convert '\\' to '/' on windows (#16852)\n```\n\n### Workarounds\nThere are no known workarounds\n\n### References\nThe vulnerable code:\n```go\n// minio/cmd/generic-handlers.go\n// Check if the incoming path has bad path components,\n// such as \"..\" and \".\"\n// SlashSeparator -\u003e /\n// dotdotComponent -\u003e ..\n// dotComponent -\u003e .\nfunc hasBadPathComponent(path string) bool {\n  path = strings.TrimSpace(path)\n  for _, p := range strings.Split(path, SlashSeparator) {\n    switch strings.TrimSpace(p) {\n    case dotdotComponent:\n      return true\n    case dotComponent:\n      return true\n    }\n  }\n  return false\n}\n```\n","status":"published","published":"2023-09-06T18:43:13Z","modified":"2026-10-08T08:11:02.39257541Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T15:46:58.04805Z"}]}}