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
1,210 results · Clear filters · Feed
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High 8.6
ElkArte Forum 1.1.9 Authenticated Remote Code Execution via Theme Upload
ElkArte Forum 1.1.9 contains a remote code execution vulnerability that allows authenticated administrators to upload malicious PHP files through the theme installation process. Attackers can upload a ZIP archive with a PHP file containing system commands, wh…
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High 8.8
An arbitrary file rename vulnerability in the /admin/manager.php component of EasyImages 2.0 v2.8.6 and below allows at…
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High 8.8
An arbitrary file upload vulnerability in the /admin/manager.php component of EasyImages 2.0 v2.8.6 and below allows at…
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High 8.7
WBCE CMS 1.6.2 Remote Code Execution via Elfinder File Upload
WBCE CMS version 1.6.2 contains a remote code execution vulnerability that allows authenticated attackers to upload malicious PHP files through the Elfinder file manager. Attackers can exploit the file upload functionality in the elfinder connector to upload …
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High 8.6
Serendipity 2.5.0 Remote Code Execution via Authenticated Media Upload
Serendipity 2.5.0 contains a remote code execution vulnerability that allows authenticated administrators to upload malicious PHP files through the media upload functionality. Attackers can exploit the file upload mechanism by creating a PHP shell with a comm…
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High 8.7
Dotclear 2.29 Remote Code Execution via Authenticated File Upload
Dotclear 2.29 contains a remote code execution vulnerability that allows authenticated attackers to upload malicious PHP files through the media upload functionality. Attackers can exploit the file upload process by crafting a PHP shell with a command executi…
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High 8.6
appRain CMF 4.0.5 Authenticated Remote Code Execution via Filemanager Upload
appRain CMF 4.0.5 contains an authenticated remote code execution vulnerability that allows administrative users to upload malicious PHP files through the filemanager upload endpoint. Attackers can leverage authenticated access to generate a web shell with co…
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High 8.8
Video Merchant <= 5.0.4 - Cross-Site Request Forgery to Arbitrary File Upload
The Video Merchant plugin for WordPress is vulnerable to Cross-Site Request Forgery in version <= 5.0.4. This is due to missing or incorrect nonce validation on the video_merchant_add_video_file() function. This makes it possible for unauthenticated attackers…
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High 8.8
LeptonCMS version 7.3.0 contains an arbitrary file upload vulnerability, which is caused by the lack of proper validati…
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High 8.8CVE-2025-13065 EPSS 14%
Starter Templates <= 4.4.41 - Authenticated (Author+) Arbitrary File Upload via WXR Upload Bypass
The Starter Templates plugin for WordPress is vulnerable to arbitrary file upload in all versions up to, and including, 4.4.41. This is due to insufficient file type validation detecting WXR files, allowing double extension files to bypass sanitization while …
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High 8.8
All-in-One Video Gallery 4.5.4 - 4.5.7 – Authenticated (Author+) Arbitrary File Upload via Import ZIP
The All-in-One Video Gallery plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the resolve_import_directory() function in versions 4.5.4 to 4.5.7. This makes it possible for authenticated attackers, with Autho…
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High 8.7
Flexsense DiskBoss Application Crash Denial of Service
Flexsense DiskBoss 7.7.14 allows unauthenticated attackers to upload arbitrary files via /Command/Search Files/Directory field, leading to a denial of service by crashing the application.
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High 8.8
Auto Thumbnailer <= 1.0 - Authenticated (Contributor+) Arbitrary File Upload
The Auto Thumbnailer plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the uploadThumb() function in all versions up to, and including, 1.0. This makes it possible for authenticated attackers, with Contributor…
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High 8.8
Featured Image via URL <= 0.1 - Authenticated (Contributor+) Arbitrary FIle Upload
The Featured Image via URL plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation function in all versions up to, and including, 0.1. This makes it possible for authenticated attackers, with Contributor-level access a…
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High 8.8
ContentStudio <= 1.3.7 - Authenticated (Author+) Arbitrary File Upload
The ContentStudio plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the cstu_update_post() function in all versions up to, and including, 1.3.7. This makes it possible for authenticated attackers, with Author-…
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High 8.8
Demo Importer Plus <= 2.0.6 - Authenticated (Author+) Arbitrary File Upload via WXR Upload Bypass
The Demo Importer Plus plugin for WordPress is vulnerable to arbitrary file upload in all versions up to, and including, 2.0.6. This is due to insufficient file type validation detecting WXR files, allowing double extension files to bypass sanitization while …
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High 8.8
zdh_web is a data collection, processing, monitoring, scheduling, and management platform. In zdh_web thru 5.6.17, insu…
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High 8.8CVE-2025-13543 Public exploit
PostGallery <= 1.12.5 - Authenticated (Subscriber+) Arbitrary File Upload
The PostGallery plugin for WordPress is vulnerable to arbitrary file uploads due to incorrect file type validation in the 'PostGalleryUploader' class functions in all versions up to, and including, 1.12.5. This makes it possible for authenticated attackers, w…
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High 7.6CVE-2025-65027 Public exploit
RomM Chained XSS and CSRF Vulnerabilities Enable Admin Account Takeover
RomM (ROM Manager) allows users to scan, enrich, browse and play their game collections with a clean and responsive interface. RomM contains multiple unrestricted file upload vulnerabilities that allow authenticated users to upload malicious SVG or HTML files…
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High 7.5
Modula 2.13.1 - 2.13.2 - Authenticated (Author+) Arbitrary File Upload via Race Condition
The Modula Image Gallery plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'ajax_unzip_file' function in versions 2.13.1 to 2.13.2. This makes it possible for authenticated attackers, with Author-level acc…
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High 8.8
GrapesJsBuilder File Upload allows all file uploads
Summary Arbitrary files can be uploaded via the GrapesJS Builder, as the types of files that can be uploaded are not restricted. ImpactIf the media folder is not restricted from running files this can lead to a remote code execution.
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High 8.1
SureMail – SMTP and Email Logs Plugin with Amazon SES, Postmark, and Other Providers <= 1.9.0 - Unauthenticated Arbitrary File Upload
The SureMail – SMTP and Email Logs Plugin for WordPress is vulnerable to Unrestricted Upload of File with Dangerous Type in versions up to and including 1.9.0. This is due to the plugin's save_file() function in inc/emails/handler/uploads.php which duplicates…
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High 7.5
EverShop 2.0.1 allows a remote unauthenticated attacker to upload arbitrary files and create directories via the /api/i…
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High 8.8
Blubrry PowerPress <= 11.15.2 - Authenticated (Contributor+) Arbitrary File Upload via 'powerpress_edit_post'
The Blubrry PowerPress plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in all versions up to, and including, 11.15.2. This is due to the plugin validating file extensions but not halting execution when val…
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High 7.2
ProjectList <= 0.3.0 - Authenticated (Editor+) Arbitrary File Upload
The ProjectList plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in all versions up to, and including, 0.3.0. This makes it possible for authenticated attackers, with Editor-level access and above, to upload arb…
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High 7.2CVE-2025-12973 Public exploit
S2B AI Assistant – ChatBot, ChatGPT, OpenAI, Content & Image Generator <= 1.7.8 - Authenticated (Editor+) Arbitrary File Upload
The S2B AI Assistant – ChatBot, ChatGPT, OpenAI, Content & Image Generator plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the storeFile() function in all versions up to, and including, 1.7.8. This makes it …
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High 8.8CVE-2025-13156 Public exploit
Vitepos – Point of Sale (POS) for WooCommerce <= 3.3.0 - Authenticated (Subscriber+) Arbitrary File Upload to Remote Code Execution
The Vitepos – Point of Sale (POS) for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the insert_media_attachment() function in all versions up to, and including, 3.3.0. This is due to the save_u…
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High 8.8
URL Image Importer <= 1.0.6 - Authenticated (Author+) Arbitrary File Upload
The URL Image Importer plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in all versions up to, and including, 1.0.6. This is due to the plugin relying on a user-controlled Content-Type HTTP header to valida…
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High 7.2
Arbitrary File Upload in Narkom Communication Technologies' Pyxis Signage
Unrestricted Upload of File with Dangerous Type vulnerability in Narkom Communication and Software Technologies Trade Ltd. Co. Pyxis Signage allows Accessing Functionality Not Properly Constrained by ACLs. This issue affects Pyxis Signage: through 31012025.
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High 8.1
Homarr is Vulnerable to Stored Cross-Site Scripting (XSS) and Possible Privilege Escalation via Malicious SVG Upload
Homarr is an open-source dashboard. Prior to version 1.43.3, stored XSS vulnerability exists, allowing the execution of arbitrary JavaScript in a user's browser, with minimal or no user interaction required, due to the rendering of a malicious uploaded SVG fi…
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High 8.7
Stored Cross-Site Scripting (XSS) in WinPlus by Informática del Este
Unlimited upload vulnerability for dangerous file types in WinPlus v24.11.27 from Informática del Este. This vulnerability allows an attacker to upload a 'webshell' by sending a POST request to '/WinplusPortal/ws/sWinplus.svc/json/uploadfile'.
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High 8.8
Possible arbitrary file upload
A low privileged remote attacker can upload any file to an arbitrary location due to missing file check resulting in remote code execution.
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High 8.8
Enable SVG, WebP, and ICO Upload <= 1.1.3 - Authenticated (Author+) Arbitrary File Upload via ICO Upload Bypass
The Enable SVG, WebP, and ICO Upload plugin for WordPress is vulnerable to arbitrary file upload in all versions up to, and including, 1.1.3. This is due to insufficient file type validation detecting ICO files, allowing double extension files with the approp…
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High 8.8
WP Dropzone <= 1.1.0 - Authenticated (Subscriber+) Arbitrary File Upload
The WP Dropzone plugin for WordPress is vulnerable to authenticated arbitrary file upload in all versions up to, and including, 1.1.0 via the `ajax_upload_handle` function. This is due to the chunked upload functionality writing files directly to the uploads …
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High 8.1
Pie Forms for WP <= 1.6 - Unauthenticated Arbitrary File Upload
The Pie Forms for WP plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.6 via the format_classic function. This is due to insufficient file type validation where the validate_classic method validates file exten…
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High 8.1
Gravity Forms <= 2.9.21.1 - Unauthenticated Arbitrary File Upload via Legacy Chunked Upload
The Gravity Forms plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the legacy chunked upload mechanism in all versions up to, and including, 2.9.21.1. This is due to the extension blacklist not including .pha…
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High 7.2
The Mozart FM Transmitter web management interface on version WEBMOZZI-00287, contains an unrestricted file upload vuln…
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High 8.8
QaTraq 6.9.2 allows authenticated users to upload arbitrary files via the "Add Attachment" feature in the "Test Script"…
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High 7.5
An arbitrary file upload vulnerability was reported in the Lenovo Scanner Pro client during an internal security assess…
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High 7.3
Apache OFBiz: Critical Remote Command Execution via Unrestricted File Upload
Unrestricted Upload of File with Dangerous Type vulnerability in Apache OFBiz. This issue affects Apache OFBiz: before 24.09.03. Users are recommended to upgrade to version 24.09.03, which fixes the issue.