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
936 results · Clear filters · Feed
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Medium 4.8
Extension - stackideas.com - Lack of mime type validation in EasyDiscuss component 1.0.0-5.0.15 for Joomla
User provided uploads to the Easy Discuss component for Joomla aren't properly validated. Uploads are purely checked by file extensions, no mime type checks are happening.
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Medium 5.4
Phpwcms 1.9.30 - Arbitrary File Upload
Phpwcms 1.9.30 contains a file upload vulnerability that allows authenticated attackers to upload malicious SVG files with embedded JavaScript. Attackers can upload crafted SVG payloads through the multiple file upload feature to potentially execute cross-sit…
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Medium 5.3
Pega Customer Service Framework versions 8.7.0 through 25.1.0 are affected by a Unrestricted file upload vulnerability, where a privileged user could potentially upload a malicious file.
Pega Customer Service Framework versions 8.7.0 through 25.1.0 are affected by a Unrestricted file upload vulnerability, where a privileged user could potentially upload a malicious file.
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Medium 6.6
Multiple vulnerabilities in SAP Fiori App (Intercompany Balance Reconciliation)
SAP Fiori App Intercompany Balance Reconciliation allows an attacker with high privileges to upload any file (including script files) without proper file format validation. This has low impact on confidentiality, integrity and availability of the application.
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Medium 5.4
WebErpMesv2 has a File Upload Validation Bypass Leading to RCE
WebErpMesv2 is a Resource Management and Manufacturing execution system Web for industry. Prior to 1.19, WebErpMesv2 contains a file upload validation bypass vulnerability in multiple controllers that allows authenticated users to upload arbitrary files, incl…
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Medium 4.7CVE-2025-15495 Public exploit
BiggiDroid Simple PHP CMS editsite.php unrestricted upload
A vulnerability was found in BiggiDroid Simple PHP CMS 1.0. This impacts an unknown function of the file /admin/editsite.php. The manipulation of the argument image results in unrestricted upload. The attack can be launched remotely. The exploit has been made…
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Medium 6.1
Drag and Drop Multiple File Upload – Contact Form 7 <= 1.3.9.2 - Unauthenticated Limited Arbitrary File Upload
The Drag and Drop Multiple File Upload – Contact Form 7 plugin for WordPress is vulnerable to limited upload of files with a dangerous type in all versions up to, and including, 1.3.9.2. This is due to the plugin not blocking .phar and .svg files. This makes …
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Medium 6.8CVE-2025-66837 Public exploit
A file upload vulnerability in ARIS 10.0.23.0.3587512 allows attackers to execute arbitrary code via uploading a crafte…
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Medium 6.3
cld378632668 JavaMall MinioController.java upload unrestricted upload
A vulnerability was found in cld378632668 JavaMall up to 994f1e2b019378ec9444cdf3fce2d5b5f72d28f0. This impacts the function Upload of the file src/main/java/com/macro/mall/controller/MinioController.java. The manipulation results in unrestricted upload. It i…
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Medium 6.3
code-projects Online Product Reservation System prod.php unrestricted upload
A flaw has been found in code-projects Online Product Reservation System 1.0. Affected by this vulnerability is an unknown functionality of the file /handgunner-administrator/prod.php. Executing a manipulation can lead to unrestricted upload. It is possible t…
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Medium 4.7
code-projects Content Management System edit_posts.php unrestricted upload
A security vulnerability has been detected in code-projects Content Management System 1.0. Impacted is an unknown function of the file /admin/edit_posts.php. The manipulation of the argument image leads to unrestricted upload. The attack is possible to be car…
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Medium 6.3
PHPGurukul Online Course Registration Student Registration edit-student-profile.php unrestricted upload
A vulnerability was found in PHPGurukul Online Course Registration up to 3.1. This issue affects some unknown processing of the file /admin/edit-student-profile.php of the component Student Registration Page. The manipulation of the argument photo results in …
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Medium 6.3
EmpireSoft EmpireCMS connect.php CheckSaveTranFiletype unrestricted upload
A vulnerability has been found in EmpireSoft EmpireCMS up to 8.0. Impacted is the function CheckSaveTranFiletype of the file e/class/connect.php. Such manipulation leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclos…
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Medium 4.7
xnx3 wangmarket XML File uploadImage.do uploadImage unrestricted upload
A vulnerability has been found in xnx3 wangmarket up to 6.4. The impacted element is the function uploadImage of the file /sits/uploadImage.do of the component XML File Handler. The manipulation of the argument image leads to unrestricted upload. Remote explo…
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Medium 6.3
campcodes School File Management System save_file.php unrestricted upload
A security vulnerability has been detected in campcodes School File Management System 1.0. The affected element is an unknown function of the file /save_file.php. The manipulation of the argument File leads to unrestricted upload. The attack may be initiated …
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Medium 5.6
Unvalidated File Upload vulnerability in ArcGIS Server.
ArcGIS Server versions 11.5 and earlier on Windows and Linux do not sufficiently validate uploaded files, enabling a remote unauthenticated attacker to upload arbitrary files to the server’s designated upload directories. However, the server’s architecture en…
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Medium 5.6
Unvalidated File Upload vulnerability in ArcGIS Server.
ArcGIS Server versions 11.5 and earlier on Windows and Linux do not sufficiently validate uploaded files, enabling a remote unauthenticated attacker to upload arbitrary files to the server’s designated upload directories. However, the server’s architecture en…
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Medium 4.7
newbee-mall-plus Product Information Edit UploadController.java upload unrestricted upload
A vulnerability was determined in newbee-mall-plus 2.0.0. This impacts the function Upload of the file src/main/java/ltd/newbee/mall/controller/common/UploadController.java of the component Product Information Edit Page. This manipulation of the argument File…
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Medium 4.7
BiggiDroid Simple PHP CMS Site Logo edit.php unrestricted upload
A security flaw has been discovered in BiggiDroid Simple PHP CMS 1.0. This impacts an unknown function of the file /admin/edit.php of the component Site Logo Handler. Performing a manipulation of the argument image results in unrestricted upload. Remote explo…
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Medium 6.3
code-projects College Notes Uploading System userprofile.php unrestricted upload
A security vulnerability has been detected in code-projects College Notes Uploading System 1.0. Impacted is an unknown function of the file /dashboard/userprofile.php. The manipulation of the argument image leads to unrestricted upload. Remote exploitation of…
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Medium 4.7
code-projects/anirbandutta9 Content Management System/News-Buzz editposts.php unrestricted upload
A security flaw has been discovered in code-projects/anirbandutta9 Content Management System and News-Buzz 1.0. This vulnerability affects unknown code of the file /admin/editposts.php. Performing manipulation of the argument image results in unrestricted upl…
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Medium 6.3
h-moses moga-mall PmsProductController.java addProduct unrestricted upload
A vulnerability was identified in h-moses moga-mall up to 392d631a5ef15962a9bddeeb9f1269b9085473fa. This vulnerability affects the function addProduct of the file src/main/java/com/ms/product/controller/PmsProductController.java. Such manipulation of the argu…
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Medium 4.7
jackq XCMS Backend ProductImageController.class.php upload unrestricted upload
A vulnerability has been found in jackq XCMS up to 3fab5342cc509945a7ce1b8ec39d19f701b89261. Affected is the function Upload of the file Admin/Home/Controller/ProductImageController.class.php of the component Backend. Such manipulation of the argument File le…
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Medium 6.3
code-projects Student File Management System save_file.php unrestricted upload
A security vulnerability has been detected in code-projects Student File Management System 1.0. This affects an unknown part of the file /save_file.php. Such manipulation of the argument File leads to unrestricted upload. The attack can be executed remotely. …
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Medium 6.3
liweiyi ChestnutCMS Filename upload FilenameUtils.getExtension unrestricted upload
A flaw has been found in liweiyi ChestnutCMS up to 1.5.8. This vulnerability affects the function FilenameUtils.getExtension of the file /dev-api/common/upload of the component Filename Handler. Executing manipulation of the argument File can lead to unrestri…
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Medium 5.3
Turms AI-Serving module v0.10.0-SNAPSHOT and earlier contains an improper file type validation vulnerability in the OCR…
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Medium 6.3
SourceCodester Client Database Management System Leads Generation user_leads.php unrestricted upload
A flaw has been found in SourceCodester Client Database Management System 1.0. This affects an unknown part of the file /user_leads.php of the component Leads Generation Module. Executing manipulation can lead to unrestricted upload. The attack can be launche…
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Medium 5.1
Academy LMS 6.1 Arbitrary File Upload Vulnerability via Profile Settings
Academy LMS 6.1 contains a file upload vulnerability that allows authenticated users to upload malicious SVG files with stored cross-site scripting payloads. Attackers can inject malicious scripts through the profile avatar upload feature by modifying file ex…
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Medium 6.9
Soosyze 2.0.0 Unrestricted File Upload via Broken Upload Logic
Soosyze 2.0.0 contains a file upload vulnerability that allows attackers to upload arbitrary HTML files with embedded PHP code to the application. Attackers can exploit the broken file upload mechanism to potentially view sensitive file paths and execute mali…
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Medium 4.7
code-projects Computer Laboratory System technical_staff_pic.php unrestricted upload
A vulnerability has been found in code-projects Computer Laboratory System 1.0. Impacted is an unknown function of the file technical_staff_pic.php. Such manipulation of the argument image leads to unrestricted upload. The attack may be launched remotely. The…
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Medium 4.7
code-projects Computer Laboratory System admin_pic.php unrestricted upload
A flaw has been found in code-projects Computer Laboratory System 1.0. This issue affects some unknown processing of the file admin/admin_pic.php. This manipulation of the argument image causes unrestricted upload. The attack may be initiated remotely. The ex…
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Medium 4.7
campcodes Online Student Enrollment System index.php unrestricted upload
A vulnerability was detected in campcodes Online Student Enrollment System 1.0. This affects an unknown function of the file /admin/index.php?page=user-profile. Performing a manipulation of the argument userphoto results in unrestricted upload. The attack can…
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Medium 4.7
SourceCodester Real Estate Property Listing App property.php unrestricted upload
A vulnerability has been found in SourceCodester Real Estate Property Listing App 1.0. The impacted element is an unknown function of the file /admin/property.php. Such manipulation of the argument image leads to unrestricted upload. It is possible to launch …
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Medium 6.3
baowzh hfly upload_json.php unrestricted upload
A vulnerability was detected in baowzh hfly up to 638ff9abe9078bc977c132b37acbe1900b63491c. The impacted element is an unknown function of the file /Public/Kindeditor/php/upload_json.php. Performing manipulation of the argument imgFile results in unrestricted…
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Medium 4.7
Campcodes Retro Basketball Shoes Online Store admin_running.php unrestricted upload
A weakness has been identified in Campcodes Retro Basketball Shoes Online Store 1.0. The impacted element is an unknown function of the file /admin/admin_running.php. Executing a manipulation of the argument product_image can lead to unrestricted upload. It i…
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Medium 6.3
Verysync 微力同步 Web Administration text.txt unrestricted upload
A flaw has been found in Verysync 微力同步 up to 2.21.3. This impacts an unknown function of the file /rest/f/api/resources/f96956469e7be39d/tmp/text.txt?override=false of the component Web Administration Module. Executing manipulation can lead to unrestricted up…
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Medium 6.3
code-projects Employee Profile Management System add_file_query.php unrestricted upload
A security flaw has been discovered in code-projects Employee Profile Management System 1.0. Impacted is an unknown function of the file /profiling/add_file_query.php. The manipulation of the argument per_file results in unrestricted upload. The attack may be…
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Medium 4.3
The E-POINT CMS eagle.gsam-1169.1 file upload feature improperly handles nested archive files. An attacker can upload a…
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Medium 6.3
ProudMuBai GoFilm FileController.go SingleUpload unrestricted upload
A vulnerability was identified in ProudMuBai GoFilm 1.0.0/1.0.1. Impacted is the function SingleUpload of the file /server/controller/FileController.go. The manipulation of the argument File leads to unrestricted upload. The attack may be initiated remotely. …
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Medium 6.3
moxi159753 Mogu Blog v2 pictures unrestricted upload
A weakness has been identified in moxi159753 Mogu Blog v2 up to 5.2. The affected element is an unknown function of the file /file/pictures. This manipulation of the argument filedatas causes unrestricted upload. The attack may be initiated remotely. The expl…