Weakness (CWE)
CWE-434: Unrestricted Upload of File with Dangerous Type
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
How to prevent it (8 mitigations)
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Architecture and Design
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]
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Architecture and Design
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.
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Architecture and Design
Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically. [REF-423]
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Implementation
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.
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Architecture and Design
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.
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Implementation
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]
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Implementation
When running on a web server that supports case-insensitive filenames, perform case-insensitive evaluations of the extensions that are provided.
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Architecture and Design
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.
Source: MITRE CWE-434
3,441 results · Feed
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Critical 10.0
Unrestricted Upload of File with Dangerous Type in Repox
An unrestricted file upload vulnerability has been identified in Repbox, which allows an attacker to upload malicious files via the transforamationfileupload function, due to the lack of proper file type validation controls, resulting in a full system comprom…
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Critical 9.9
Student Information System v1.0 - Insecure File Upload
Student Information System v1.0 is vulnerable to an Insecure File Upload vulnerability on the 'photo' parameter of my-profile page, allowing an authenticated attacker to obtain Remote Code Execution on the server hosting the application.
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Medium 6.3
Byzoro S210 HTTP POST Request uploadfile.php unrestricted upload
A vulnerability was found in Byzoro S210 up to 20231123. It has been declared as critical. This vulnerability affects unknown code of the file /Tool/uploadfile.php of the component HTTP POST Request Handler. The manipulation of the argument file_upload leads …
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Medium 6.3
Byzoro Smart S20 HTTP POST Request updateos.php unrestricted upload
A vulnerability was found in Byzoro Smart S20 up to 20231120 and classified as critical. Affected by this issue is some unknown functionality of the file /sysmanage/updateos.php of the component HTTP POST Request Handler. The manipulation of the argument 1_fi…
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High 7.5
Failure when uploading a Logo image file
AMI AptioV contains a vulnerability in BIOS where a User may cause an unrestricted upload of a BMP Logo file with dangerous type by Local access. A successful exploit of this vulnerability may lead to a loss of Confidentiality, Integrity, and/or Availability.
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High 7.5CVE-2023-39539 Public exploit
Failure when uploading a Logo image file
AMI AptioV contains a vulnerability in BIOS where a User may cause an unrestricted upload of a PNG Logo file with dangerous type by Local access. A successful exploit of this vulnerability may lead to a loss of Confidentiality, Integrity, and/or Availability.
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High 7.1
Improper input leads to DoS
The ACEManager component of ALEOS 4.16 and earlier does not validate uploaded file names and types, which could potentially allow an authenticated user to perform client-side script execution within ACEManager, altering the device functionality until the devi…
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High 8.8
ThinkAdmin arbitrary file upload vulnerability
An arbitrary file upload vulnerability in the component /admin/api.upload/file of ThinkAdmin v6.1.53 allows attackers to execute arbitrary code via a crafted Zip file.
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Critical 9.8
Malicious File Upload in ArslanSoft's Education Portal
Unrestricted Upload of File with Dangerous Type vulnerability in ArslanSoft Education Portal allows Command Injection. This issue affects Education Portal: before v1.1.
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High 7.5
Plaintext Storage of a Password in ArslanSoft's Education Portal
Unrestricted Upload of File with Dangerous Type vulnerability in ArslanSoft Education Portal allows Read Sensitive Strings Within an Executable. This issue affects Education Portal: before v1.1.
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Medium 6.6
Contact Form 7 <= 5.8.3 - Authenticated (Editor+) Arbitrary File Upload
The Contact Form 7 plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'validate' function and insufficient blocklisting on the 'wpcf7_antiscript_file_name' function in versions up to, and including, 5.…
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Medium 4.7CVE-2023-5966 Public exploit
Unrestricted Upload of File with Dangerous Type in EspoCRM
An authenticated privileged attacker could upload a specially crafted zip to the EspoCRM server in version 7.2.5, via the extension deployment form, which could lead to arbitrary PHP code execution.
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Medium 4.7CVE-2023-5965 Public exploit
Unrestricted Upload of File with Dangerous Type in EspoCRM
An authenticated privileged attacker could upload a specially crafted zip to the EspoCRM server in version 7.2.5, via the update form, which could lead to arbitrary PHP code execution.
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High 8.8CVE-2023-49052 Public exploit
Microweber file upload vulnerability
File Upload vulnerability in Microweber v.2.0.4 allows a remote attacker to execute arbitrary code via a crafted script to the file upload function in the created forms component.
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High 8.8
Chamilo LMS File Upload Functionality Remote Code Execution
Unrestricted file upload in `/main/inc/ajax/exercise.ajax.php` in Chamilo LMS <= v1.11.24 allows authenticated attackers with learner role to obtain remote code execution via uploading of PHP files.
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High 8.8CVE-2023-4226 Public exploit
Chamilo LMS File Upload Functionality Remote Code Execution
Unrestricted file upload in `/main/inc/ajax/work.ajax.php` in Chamilo LMS <= v1.11.24 allows authenticated attackers with learner role to obtain remote code execution via uploading of PHP files.
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High 8.8
Chamilo LMS File Upload Functionality Remote Code Execution
Unrestricted file upload in `/main/inc/ajax/dropbox.ajax.php` in Chamilo LMS <= v1.11.24 allows authenticated attackers with learner role to obtain remote code execution via uploading of PHP files.
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High 8.8
Chamilo LMS File Upload Functionality Remote Code Execution
Unrestricted file upload in `/main/inc/ajax/document.ajax.php` in Chamilo LMS <= v1.11.24 allows authenticated attackers with learner role to obtain remote code execution via uploading of PHP files.
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High 8.1
Chamilo LMS Unauthenticated Big Upload File Remote Code Execution
Unrestricted file upload in big file upload functionality in `/main/inc/lib/javascript/bigupload/inc/bigUpload.php` in Chamilo LMS <= v1.11.24 allows unauthenticated attackers to perform stored cross-site scripting attacks and obtain remote code execution via…
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High 7.2
BookingPress <= 1.0.76 - Authenticated (Administrator+) Arbitrary File Upload
The BookingPress plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file validation on the 'bookingpress_process_upload' function in versions up to, and including, 1.0.76. This makes it possible for authenticated attackers with a…
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Critical 9.8CVE-2023-41998 EPSS 15%
Arcserve UDP Unauthenticated RCE
Arcserve UDP prior to 9.2 contained a vulnerability in the com.ca.arcflash.rps.webservice.RPSService4CPMImpl interface. A routine exists that allows an attacker to upload and execute arbitrary files.
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Medium 6.3
Xiamen Four-Faith Video Surveillance Management System Apache Struts unrestricted upload
A vulnerability, which was classified as critical, has been found in Xiamen Four-Faith Video Surveillance Management System 2016/2017. Affected by this issue is some unknown functionality of the component Apache Struts. The manipulation leads to unrestricted …
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Medium 6.3
Byzoro Smart S80 PHP File updatelib.php unrestricted upload
A vulnerability was found in Byzoro Smart S80 up to 20231108. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /sysmanage/updatelib.php of the component PHP File Handler. The manipulation of the argument…
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Medium 5.7
Uploading executables via the file manager
Unrestricted Upload of File with Dangerous Type vulnerability in Pandora FMS on all allows Accessing Functionality Not Properly Constrained by ACLs. This vulnerability allowed PHP executable files to be uploaded through the file manager. This issue affects Pa…
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High 7.6
Remote Code Execution via File Uploader
Unrestricted Upload of File with Dangerous Type vulnerability in Pandora FMS on all allows Accessing Functionality Not Properly Constrained by ACLs. This vulnerability allows attackers to execute code via PHP file uploads. This issue affects Pandora FMS: from…
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High 8.1
Drag and Drop Multiple File Upload - Contact Form 7 <= 1.3.7.3 - Unauthenticated Arbitrary File Upload
The Drag and Drop Multiple File Upload - Contact Form 7 plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'dnd_upload_cf7_upload' function in versions up to, and including, 1.3.7.3. This makes it poss…
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High 7.5CVE-2023-6187 EPSS 51%
Paid Memberships Pro <= 2.12.3 - Authenticated (Subscriber+) Arbitrary File Upload
The Paid Memberships Pro plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'pmpro_paypalexpress_session_vars_for_user_fields' function in versions up to, and including, 2.12.3. This makes it possible …
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Unscored —
CLUSTERPRO X Ver5.1 and earlier and EXPRESSCLUSTER X 5.1 and earlier, CLUSTERPRO X SingleServerSafe 5.1 and earlier, EX…
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Critical 9.8
OpenSupports v4.11.0 is vulnerable to Unrestricted Upload of File with Dangerous Type. In the comment function, an atta…
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Medium 6.6
Forminator <= 1.27.0 - Authenticated (Administrator+) Arbitrary File Upload
The Forminator plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient blacklisting on the 'forminator_allowed_mime_types' function in versions up to, and including, 1.27.0. This makes it possible for authenticated attackers with admi…
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High 8.8
Remote code execution via form uploads in statamic/cms
Statamic is a flat-first, Laravel + Git powered CMS designed for building websites. In affected versions certain additional PHP files crafted to look like images may be uploaded regardless of mime type validation rules. This affects front-end forms using the …
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Medium 5.4
Unrestricted Upload of File with Dangerous Type in salesagility/suitecrm
Unrestricted Upload of File with Dangerous Type in GitHub repository salesagility/suitecrm prior to 7.14.2, 7.12.14, 8.4.2.
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High 8.8
Remote code execution via file uploads in guest-entries
Guest Entries is a php library which allows users to create, update & delete entries from the front-end of a site. In affected versions the file uploads feature did not prevent the upload of PHP files. This may lead to code execution on the server by authenti…
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Medium 5.3
Maiwei Safety Production Control Platform unrestricted upload
A vulnerability, which was classified as problematic, was found in Maiwei Safety Production Control Platform 4.1. Affected is an unknown function of the file /Content/Plugins/uploader/FileChoose.html?fileUrl=/Upload/File/Pics/&parent. The manipulation leads t…
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High 8.4CVE-2023-47129 Public exploit
Statamic CMS remote code execution via front-end form uploads
Statmic is a core Laravel content management system Composer package. Prior to versions 3.4.13 and 4.33.0, on front-end forms with an asset upload field, PHP files crafted to look like images may be uploaded. This only affects forms using the "Forms" feature …
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Critical 9.1
WS_FTP Server Arbitrary File Upload
In WS_FTP Server versions prior to 8.7.6 and 8.8.4, an unrestricted file upload flaw has been identified. An authenticated Ad Hoc Transfer user has the ability to craft an API call which allows them to upload a file to a specified location on the underlying o…
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High 8.8
RemoteClinic 2.0 contains a critical vulnerability chain that can be exploited by a remote attacker with low-privileged…
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High 7.8
Ivanti Avalanche EnterpriseServer Service Unrestricted File Upload Local Privilege Escalation Vulnerability
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High 8.8
Galaxy Software Services Vitals ESP - Arbitrary File Upload
Galaxy Software Services Corporation Vitals ESP is an online knowledge base management portal, it has insufficient filtering and validation during file upload. An authenticated remote attacker with general user privilege can exploit this vulnerability to uplo…
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Medium 4.7
SourceCodester Company Website CMS Create Blog Page createblog unrestricted upload
A vulnerability was found in SourceCodester Company Website CMS 1.0 and classified as problematic. Affected by this issue is some unknown functionality of the file /dashboard/createblog of the component Create Blog Page. The manipulation leads to unrestricted…