CWE-434
AllowedUnrestricted Upload of File with Dangerous Type
Abstraction: Base · Status: Draft
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
5971 vulnerabilities reference this CWE, most recent first.
GHSA-PJFR-QF3P-3Q25
Vulnerability from github – Published: 2018-10-17 16:30 – Updated: 2025-10-22 17:31When running Apache Tomcat 7.0.0 to 7.0.79 on Windows with HTTP PUTs enabled (e.g. via setting the readonly initialisation parameter of the Default to false) it was possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.tomcat.embed:tomcat-embed-core"
},
"ranges": [
{
"events": [
{
"introduced": "7.0.0"
},
{
"fixed": "7.0.79"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2017-12615"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:49:21Z",
"nvd_published_at": "2017-09-19T13:29:00Z",
"severity": "HIGH"
},
"details": "When running Apache Tomcat 7.0.0 to 7.0.79 on Windows with HTTP PUTs enabled (e.g. via setting the readonly initialisation parameter of the Default to false) it was possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server.",
"id": "GHSA-pjfr-qf3p-3q25",
"modified": "2025-10-22T17:31:15Z",
"published": "2018-10-17T16:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-12615"
},
{
"type": "WEB",
"url": "https://www.synology.com/support/security/Synology_SA_17_54_Tomcat"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/42953"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12615"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20171018-0001"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c@%3Cdev.tomcat.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c@%3Cannounce.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c%40%3Cannounce.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/8fcb1e2d5895413abcf266f011b9918ae03e0b7daceb118ffbf23f8c@%3Cannounce.tomcat.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/8fcb1e2d5895413abcf266f011b9918ae03e0b7daceb118ffbf23f8c%40%3Cannounce.tomcat.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424@%3Cdev.tomcat.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7@%3Cdev.tomcat.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708@%3Cdev.tomcat.apache.org%3E"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.apache.org%3E"
},
{
"type": "WEB",
"url": "https://github.com/breaktoprotect/CVE-2017-12615"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-pjfr-qf3p-3q25"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:0466"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:0465"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2017:3114"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2017:3113"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2017:3081"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2017:3080"
},
{
"type": "WEB",
"url": "http://breaktoprotect.blogspot.com/2017/09/the-case-of-cve-2017-12615-tomcat-7-put.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/100901"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1039392"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H",
"type": "CVSS_V3"
}
],
"summary": "When running Apache Tomcat on Windows with HTTP PUTs enabled it was possible to upload a JSP file to the server"
}
GHSA-PJJ8-W7G3-6HWQ
Vulnerability from github – Published: 2022-05-24 17:24 – Updated: 2022-05-24 17:24Improper Input Validation in Teltonika firmware TRB2_R_00.02.04.01 allows a remote, authenticated attacker to gain root privileges by uploading a malicious backup archive.
{
"affected": [],
"aliases": [
"CVE-2020-5771"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-08-03T20:15:00Z",
"severity": "HIGH"
},
"details": "Improper Input Validation in Teltonika firmware TRB2_R_00.02.04.01 allows a remote, authenticated attacker to gain root privileges by uploading a malicious backup archive.",
"id": "GHSA-pjj8-w7g3-6hwq",
"modified": "2022-05-24T17:24:54Z",
"published": "2022-05-24T17:24:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-5771"
},
{
"type": "WEB",
"url": "https://www.tenable.com/security/research/tra-2020-48"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-PJV5-66G3-7GQX
Vulnerability from github – Published: 2024-04-12 15:37 – Updated: 2024-07-05 15:32Unrestricted file upload vulnerability in OpenGnsys affecting version 1.1.1d (Espeto). This vulnerability allows an attacker to send a POST request to the endpoint '/opengnsys/images/M_Icons.php' modifying the file extension, due to lack of file extension verification, resulting in a webshell injection.
{
"affected": [],
"aliases": [
"CVE-2024-3705"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-12T14:15:08Z",
"severity": "HIGH"
},
"details": "Unrestricted file upload vulnerability in OpenGnsys affecting version 1.1.1d (Espeto). This vulnerability allows an attacker to send a POST request to the endpoint \u0027/opengnsys/images/M_Icons.php\u0027 modifying the file extension, due to lack of file extension verification, resulting in a webshell injection.",
"id": "GHSA-pjv5-66g3-7gqx",
"modified": "2024-07-05T15:32:05Z",
"published": "2024-04-12T15:37:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-3705"
},
{
"type": "WEB",
"url": "https://opengnsys.es/web/parche-de-seguridad-cve-2024-370x"
},
{
"type": "WEB",
"url": "https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-opengnsys"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-PM3M-8F44-M4V9
Vulnerability from github – Published: 2026-02-04 00:30 – Updated: 2026-02-10 18:30School ERP Pro 1.0 contains a remote code execution vulnerability that allows authenticated admin users to upload arbitrary PHP files as profile photos by bypassing file extension checks. Attackers can exploit improper file validation in pre-editstudent.inc.php to execute arbitrary code on the server.
{
"affected": [],
"aliases": [
"CVE-2020-37084"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-03T23:16:04Z",
"severity": "HIGH"
},
"details": "School ERP Pro 1.0 contains a remote code execution vulnerability that allows authenticated admin users to upload arbitrary PHP files as profile photos by bypassing file extension checks. Attackers can exploit improper file validation in pre-editstudent.inc.php to execute arbitrary code on the server.",
"id": "GHSA-pm3m-8f44-m4v9",
"modified": "2026-02-10T18:30:34Z",
"published": "2026-02-04T00:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-37084"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20190612111732/https://sourceforge.net/projects/school-erp-ultimate"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20200129123503/http://arox.in"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/48392"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/school-erp-pro-admin-profile-photo-upload-remote-code-execution-vulnerability"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-PM69-C5JV-GMXX
Vulnerability from github – Published: 2025-09-06 03:30 – Updated: 2025-09-06 03:30The Multi Step Form plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation via the import functionality in all versions up to, and including, 1.7.25. This makes it possible for authenticated attackers, with Administrator-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
{
"affected": [],
"aliases": [
"CVE-2025-9515"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-06T03:15:41Z",
"severity": "HIGH"
},
"details": "The Multi Step Form plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation via the import functionality in all versions up to, and including, 1.7.25. This makes it possible for authenticated attackers, with Administrator-level access and above, to upload arbitrary files on the affected site\u0027s server which may make remote code execution possible.",
"id": "GHSA-pm69-c5jv-gmxx",
"modified": "2025-09-06T03:30:22Z",
"published": "2025-09-06T03:30:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9515"
},
{
"type": "WEB",
"url": "https://github.com/mlooft/multi-step-form/commit/590f9ac9d746b2a8aec0c12ba770252e86dc40ed"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3351951%40multi-step-form\u0026new=3351951%40multi-step-form\u0026sfp_email=\u0026sfph_mail="
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/af7dbb61-90b1-4a61-819e-bcef88b12b7f?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-PM7P-JJC6-M4M4
Vulnerability from github – Published: 2025-02-24 00:30 – Updated: 2025-02-24 00:30A vulnerability was found in SourceCodester Best Church Management Software 1.0. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /admin/app/asset_crud.php. The manipulation of the argument photo1 leads to unrestricted upload. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
{
"affected": [],
"aliases": [
"CVE-2025-1598"
],
"database_specific": {
"cwe_ids": [
"CWE-284",
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-24T00:15:09Z",
"severity": "MODERATE"
},
"details": "A vulnerability was found in SourceCodester Best Church Management Software 1.0. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /admin/app/asset_crud.php. The manipulation of the argument photo1 leads to unrestricted upload. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.",
"id": "GHSA-pm7p-jjc6-m4m4",
"modified": "2025-02-24T00:30:55Z",
"published": "2025-02-24T00:30:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-1598"
},
{
"type": "WEB",
"url": "https://github.com/xiahao90/CVEproject/blob/main/xiahao.webray.com.cn/best-church-management-software-Arbitrary-File-Upload.md"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.296593"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.296593"
},
{
"type": "WEB",
"url": "https://vuldb.com/?submit.497891"
},
{
"type": "WEB",
"url": "https://www.sourcecodester.com"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-PM8W-GMC4-2W2J
Vulnerability from github – Published: 2022-05-14 01:48 – Updated: 2022-05-14 01:48Denbun by NEOJAPAN Inc. (Denbun POP version V3.3P R4.0 and earlier, Denbun IMAP version V3.3I R4.0 and earlier) allows remote authenticated attackers to upload and execute any executable files via unspecified vectors.
{
"affected": [],
"aliases": [
"CVE-2018-0686"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-11-15T15:29:00Z",
"severity": "HIGH"
},
"details": "Denbun by NEOJAPAN Inc. (Denbun POP version V3.3P R4.0 and earlier, Denbun IMAP version V3.3I R4.0 and earlier) allows remote authenticated attackers to upload and execute any executable files via unspecified vectors.",
"id": "GHSA-pm8w-gmc4-2w2j",
"modified": "2022-05-14T01:48:27Z",
"published": "2022-05-14T01:48:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-0686"
},
{
"type": "WEB",
"url": "https://www.denbun.com/en/imap/support/security/181003.html"
},
{
"type": "WEB",
"url": "https://www.denbun.com/en/pop/support/security/181003.html"
},
{
"type": "WEB",
"url": "http://jvn.jp/en/jp/JVN00344155/index.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-PMCR-7M5C-FFG9
Vulnerability from github – Published: 2024-10-05 09:30 – Updated: 2024-10-05 09:30The Bit File Manager – 100% Free & Open Source File Manager and Code Editor for WordPress plugin for WordPress is vulnerable to Limited JavaScript File Upload in all versions up to, and including, 6.5.7. This is due to a lack of proper checks on allowed file types. This makes it possible for authenticated attackers, with Subscriber-level access and above, and granted permissions by an administrator, to upload .css and .js files, which could lead to Stored Cross-Site Scripting.
{
"affected": [],
"aliases": [
"CVE-2024-8743"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-05T07:15:12Z",
"severity": "MODERATE"
},
"details": "The Bit File Manager \u2013 100% Free \u0026 Open Source File Manager and Code Editor for WordPress plugin for WordPress is vulnerable to Limited JavaScript File Upload in all versions up to, and including, 6.5.7. This is due to a lack of proper checks on allowed file types. This makes it possible for authenticated attackers, with Subscriber-level access and above, and granted permissions by an administrator, to upload .css and .js files, which could lead to Stored Cross-Site Scripting.",
"id": "GHSA-pmcr-7m5c-ffg9",
"modified": "2024-10-05T09:30:28Z",
"published": "2024-10-05T09:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-8743"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/changeset/3161219"
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/314520d5-bd9d-46c1-b903-5e5cb3bb3417?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-PMGQ-H38F-3H8P
Vulnerability from github – Published: 2026-01-07 12:31 – Updated: 2026-01-07 12:31The WP Enable WebP plugin for WordPress is vulnerable to arbitrary file uploads due to improper file type validation in the 'wpse_file_and_ext_webp' function in all versions up to, and including, 1.0. This makes it possible for authenticated attackers, with Author-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
{
"affected": [],
"aliases": [
"CVE-2025-15158"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-07T12:16:59Z",
"severity": "HIGH"
},
"details": "The WP Enable WebP plugin for WordPress is vulnerable to arbitrary file uploads due to improper file type validation in the \u0027wpse_file_and_ext_webp\u0027 function in all versions up to, and including, 1.0. This makes it possible for authenticated attackers, with Author-level access and above, to upload arbitrary files on the affected site\u0027s server which may make remote code execution possible.",
"id": "GHSA-pmgq-h38f-3h8p",
"modified": "2026-01-07T12:31:23Z",
"published": "2026-01-07T12:31:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-15158"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/wp-enable-webp/trunk/wp-enable-webp.php?rev=1998897#L43"
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/fa53c5ee-fe7f-4fb2-baaa-2c1a151d4b2c?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-PMM3-68Q9-57JG
Vulnerability from github – Published: 2024-03-22 06:30 – Updated: 2024-08-02 13:27Arbitrary File Upload vulnerability in VvvebJs before version 1.7.5, allows unauthenticated remote attackers to execute arbitrary code and obtain sensitive information via the sanitizeFileName parameter in save.php.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "vvvebJs"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-29272"
],
"database_specific": {
"cwe_ids": [
"CWE-434"
],
"github_reviewed": true,
"github_reviewed_at": "2024-08-02T13:27:23Z",
"nvd_published_at": "2024-03-22T04:15:11Z",
"severity": "MODERATE"
},
"details": "Arbitrary File Upload vulnerability in VvvebJs before version 1.7.5, allows unauthenticated remote attackers to execute arbitrary code and obtain sensitive information via the sanitizeFileName parameter in save.php.",
"id": "GHSA-pmm3-68q9-57jg",
"modified": "2024-08-02T13:27:23Z",
"published": "2024-03-22T06:30:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-29272"
},
{
"type": "WEB",
"url": "https://github.com/givanz/VvvebJs/issues/343"
},
{
"type": "WEB",
"url": "https://github.com/givanz/VvvebJs/commit/c6422cfd4d835c2fa6d512645e30015f24538ef0"
},
{
"type": "PACKAGE",
"url": "https://github.com/givanz/VvvebJs"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "VvvebJs Arbitrary File Upload vulnerability"
}
Mitigation
Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.[REF-422] [REF-423]
Mitigation MIT-21
Strategy: Enforcement by Conversion
When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
Mitigation
Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically. [REF-423]
Mitigation MIT-5
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
- For example, limiting filenames to alphanumeric characters can help to restrict the introduction of unintended file extensions.
Mitigation
Define a very limited set of allowable extensions and only generate filenames that end in these extensions. Consider the possibility of XSS (CWE-79) before allowing .html or .htm file types.
Mitigation
Strategy: Input Validation
Ensure that only one extension is used in the filename. Some web servers, including some versions of Apache, may process files based on inner extensions so that "filename.php.gif" is fed to the PHP interpreter.[REF-422] [REF-423]
Mitigation
When running on a web server that supports case-insensitive filenames, perform case-insensitive evaluations of the extensions that are provided.
Mitigation MIT-15
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Mitigation
Do not rely exclusively on sanity checks of file contents to ensure that the file is of the expected type and size. It may be possible for an attacker to hide code in some file segments that will still be executed by the server. For example, GIF images may contain a free-form comments field.
Mitigation
Do not rely exclusively on the MIME content type or filename attribute when determining how to render a file. Validating the MIME content type and ensuring that it matches the extension is only a partial solution.
Mitigation MIT-17
Strategy: Environment Hardening
Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
Mitigation MIT-22
Strategy: Sandbox or Jail
- Run the code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
- OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
- This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
- Be careful to avoid CWE-243 and other weaknesses related to jails.
CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs
In applications, particularly web applications, access to functionality is mitigated by an authorization framework. This framework maps Access Control Lists (ACLs) to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application, or can run queries for data that they otherwise not supposed to.