{"id":"CVE-2021-23427","aliases":["EUVD-2021-2127","GHSA-wmpm-fq7r-jq56"],"status":"published","title":"Arbitrary File Write via Archive Extraction (Zip Slip)","description":"This affects all versions of package elFinder.NetCore. The ExtractAsync function within the FileSystem is vulnerable to arbitrary extraction due to insufficient validation.","severity":{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L/E:F/RL:U/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01431,"percentile":0.73406,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20","CWE-22"],"published":"2021-09-01T14:30:17Z","modified":"2026-06-17T03:38:44Z","affected":[{"source":"ghsa","ecosystem":"NuGet","package":"elFinder.NetCore","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.3.5"}]}]},{"source":"osv","ecosystem":"NuGet","package":"elFinder.NetCore","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.3.5"}]}],"versions":["1.0.0","1.0.1","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.0.8","1.0.9","1.1.0","1.2.1","1.2.2","1.3.0","1.3.1","1.3.2","1.3.3","1.3.4","1.3.5"]}],"products":[{"vendor":"elfinder.netcore_project","product":"elfinder.netcore"}],"references":[{"url":"https://snyk.io/vuln/SNYK-DOTNET-ELFINDERNETCORE-1567778","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://github.com/gordon-matt/elFinder.NetCore/blob/633da9a4d7d5c9baefd1730ee51bf7af54889600/elFinder.NetCore/Drivers/FileSystem/FileSystemDriver.cs%23L226","tags":["x_refsource_MISC","x_transferred","Broken Link","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23427","tags":["advisory"]},{"url":"https://github.com/gordon-matt/elFinder.NetCore/blob/633da9a4d7d5c9baefd1730ee51bf7af54889600/elFinder.NetCore/Drivers/FileSystem/FileSystemDriver.cs#L226","tags":["web"]},{"url":"https://github.com/advisories/GHSA-wmpm-fq7r-jq56"},{"url":"https://github.com/gordon-matt/elFinder.NetCore","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-23427","title":"Arbitrary File Write via Archive Extraction (Zip Slip)","description":"This affects all versions of package elFinder.NetCore. The ExtractAsync function within the FileSystem is vulnerable to arbitrary extraction due to insufficient validation.","status":"published","published":"2021-09-01T14:30:17.562Z","modified":"2024-09-16T16:38:08.993Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L/E:F/RL:U/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:00.488332Z"}],"euvd":[{"id":"EUVD-2021-2127","description":"This affects all versions of package elFinder.NetCore. 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The ExtractAsync function within the FileSystem is vulnerable to arbitrary extraction due to insufficient validation.","status":"published","published":"2021-09-02T22:05:17Z","modified":"2023-01-27T05:01:59Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:36:17.04874Z"}],"nvd":[{"id":"CVE-2021-23427","description":"This affects all versions of package elFinder.NetCore. The ExtractAsync function within the FileSystem is vulnerable to arbitrary extraction due to insufficient validation.","status":"published","published":"2021-09-01T15:15:08.463Z","modified":"2026-06-17T03:38:44.617Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:06:57.67549Z"}],"osv":[{"id":"GHSA-wmpm-fq7r-jq56","title":"Imporoper path validation in elFinder.NetCore","description":"This affects all versions of package elFinder.NetCore. The ExtractAsync function within the FileSystem is vulnerable to arbitrary extraction due to insufficient validation.","status":"published","published":"2021-09-02T22:05:17Z","modified":"2026-03-13T21:56:55.998354Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:46:58.767335Z"}]}}