Common Weakness Enumeration
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.
6250 vulnerabilities reference this CWE, most recent first.
CVE-2026-21877 (GCVE-0-2026-21877)
Vulnerability from cvelistv5 – Published: 2026-01-08 00:39 – Updated: 2026-01-08 18:59
VLAI
EPSS
VEX
Title
n8n is vulnerable to Remote Code Execution via Arbitrary File Write
Summary
n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-08 18:59 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | x_refsource_CONFIRM |
| https://github.com/n8n-io/n8n/commit/f4b009d00d1f… | x_refsource_MISC |
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CVE-2026-21662 (GCVE-0-2026-21662)
Vulnerability from cvelistv5 – Published: 2026-07-31 17:30 – Updated: 2026-07-31 18:24
VLAI
EPSS
VEX
Title
FMS Employee Allows Upload of Unrestricted Files
Summary
Unrestricted upload of file with dangerous type vulnerability in Johnson Controls FM Systems Employee allows Using Malicious Files.
This issue affects FM Systems Employee: before 2025.3.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 18:24 UTC
CWE
- CWE-434 - Unrestricted upload of file with dangerous type
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Johnson Controls | FM Systems Employee |
Affected:
0 , < 2025.3.1
(custom)
cpe:2.3:a:johnson_controls:fm_systems_employee:*:*:*:*:*:*:*:* |
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CVE-2026-21628 (GCVE-0-2026-21628)
Vulnerability from cvelistv5 – Published: 2026-03-05 09:24 – Updated: 2026-03-05 14:30
VLAI
EPSS
VEX
Title
Extension - astroidframe.work - Unauthenticated Remote Code Execution in Astroid Framework 2.0.0 - 3.3.10 for Joomla
Summary
A improperly secured file management feature allows uploads of dangerous data types for unauthenticated users, leading to remote code execution.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-05 14:29 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://astroidframe.work | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| astroidframe.work | Astroid Template Framework |
Affected:
2.0.0-3.3.10
|
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CVE-2026-21625 (GCVE-0-2026-21625)
Vulnerability from cvelistv5 – Published: 2026-01-16 15:06 – Updated: 2026-01-16 15:35
VLAI
EPSS
VEX
Title
Extension - stackideas.com - Lack of mime type validation in EasyDiscuss component 1.0.0-5.0.15 for Joomla
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-16 15:35 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://stackideas.com/easydiscuss | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Stackideas.com | EasyDiscuss extension for Joomla |
Affected:
1.0.0-5.0.15
|
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CVE-2026-21536 (GCVE-0-2026-21536)
Vulnerability from cvelistv5 – Published: 2026-03-05 22:18 – Updated: 2026-06-19 18:17 Exclusively Hosted Service
VLAI
EPSS
VEX
Title
Microsoft Devices Pricing Program Remote Code Execution Vulnerability
Summary
Microsoft Devices Pricing Program Remote Code Execution Vulnerability
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-09 20:28 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft Devices Pricing Program |
Affected:
-
cpe:2.3:a:microsoft:devices_pricing_program:*:*:*:*:*:*:*:* |
Date Public
2026-03-05 16:00
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CVE-2026-20098 (GCVE-0-2026-20098)
Vulnerability from cvelistv5 – Published: 2026-02-04 16:11 – Updated: 2026-02-26 15:04
VLAI
EPSS
VEX
Title
Cisco Meeting Management Arbitrary File Upload Vulnerability
Summary
A vulnerability in the Certificate Management feature of Cisco Meeting Management could allow an authenticated, remote attacker to upload arbitrary files, execute arbitrary commands, and elevate privileges to root on an affected system.
This vulnerability is due to improper input validation in certain sections of the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected system. A successful exploit could allow the attacker to upload arbitrary files to the affected system. The malicious files could overwrite system files that are processed by the root system account and allow arbitrary command execution with root privileges. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of video operator.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-05 04:55 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Meeting Management |
Affected:
CMM3.4.0
Affected: CMM3.2.0 Affected: CMM2.9.1 Affected: CMM2.9.0 Affected: CMM3.1.0 Affected: CMM3.5.0 Affected: CMM3.6.0 Affected: CMM3.6.1 Affected: CMM3.7.0 Affected: CMM3.8.0 Affected: CMM3.9.0 Affected: CMM3.10.0 Affected: CMM3.9.1 Affected: CMM3.11.0 Affected: CMM3.12.0 |
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GCVE-1-2026-20014 (CVE-2026-74767)
Vulnerability from gna-1 – Published: 2026-08-15 21:53 – Updated: 2026-08-15 21:56
VLAI
EPSS
VEX
Title
Unbounded DAA Decompression in Pandora Allows Denial of Service via Decompression Bomb
Summary
Pandora contains a denial-of-service vulnerability in its handling of DAA (Direct Access Archive) files. When extracting the internal ISO image from a DAA archive, compressed chunks were decompressed using zlib.decompress() without enforcing a limit on the resulting uncompressed data.
An attacker able to submit a crafted DAA file containing highly compressed data could cause Pandora to decompress a relatively small input into a very large amount of data in memory. Because the decompressed chunks are accumulated to construct the internal ISO image, this could result in excessive memory consumption and potentially CPU exhaustion, causing the extraction worker to become unresponsive, terminate, or affect the availability of the Pandora service.
The patch introduces bounded decompression using decompressobj().decompress() with max_extracted_filesize, verifies the cumulative size of decompressed chunks, and raises a dedicated ZipBomb exception when the configured limit is exceeded. Pandora then aborts extraction and reports the file as too large.
Severity
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/pandora-analysis/pandora/commi… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| pandora-analysis | pandora |
Affected:
0 , ≤ 1.12.5
(semver)
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CVE-2026-19852 (GCVE-0-2026-19852)
Vulnerability from cvelistv5 – Published: 2026-08-24 03:35 – Updated: 2026-08-24 16:49
VLAI
EPSS
VEX
Title
CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload
Summary
NewSiteServer (NSS) developed by CyberTutor has an Arbitrary File Upload vulnerability. Unauthenticated remote attackers can upload arbitrary files, including malicious HTML files, thereby achieving effects similar to cross-site scripting.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 16:47 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.twcert.org.tw/tw/cp-132-11116-2c1d8-1.html | third-party-advisory |
| https://www.twcert.org.tw/en/cp-139-11120-64c52-2.html | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CyberTutor | NewSiteServer (NSS) |
Affected:
all
(custom)
|
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CVE-2026-19839 (GCVE-0-2026-19839)
Vulnerability from cvelistv5 – Published: 2026-08-14 16:15 – Updated: 2026-08-18 02:08 X_Freeware
VLAI
EPSS
VEX
Title
SourceCodester Simple Doctors Appointment System save_file.php save_doctor unrestricted upload
Summary
A vulnerability was detected in SourceCodester Simple Doctors Appointment System 1.0. This issue affects the function save_doctor of the file /save_file.php. The manipulation results in unrestricted upload. The attack can be executed remotely. The exploit is now public and may be used.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 02:08 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/389977 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/389977/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-19839 | third-party-advisory |
| https://vuldb.com/submit/870577 | third-party-advisory |
| https://github.com/HZFW2026/cve/issues/3 | exploitissue-tracking |
| https://www.sourcecodester.com/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SourceCodester | Simple Doctors Appointment System |
Affected:
1.0
cpe:2.3:a:sourcecodester:simple_doctors_appointment_system:*:*:*:*:*:*:*:* |
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CVE-2026-19513 (GCVE-0-2026-19513)
Vulnerability from cvelistv5 – Published: 2026-09-01 13:29 – Updated: 2026-09-01 14:55
VLAI
EPSS
VEX
Title
Gravity Forms <= 3.0.2 - Unauthenticated Arbitrary File Upload via State/Chunk Hash Confusion
Summary
The Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.0.2. This is due to insufficient validation of multi-file upload chunk state in the `GFAsyncUpload::upload()` function, where public form state URL hashes can be reused as chunk continuation hashes and attacker-controlled temporary filenames are accepted before sanitization. This makes it possible for unauthenticated attackers, when a public form contains a File Upload field with Multiple Files enabled, to upload a valid PNG/PDF polyglot to an attacker-selected public `.php` or `.html` filename in the Gravity Forms temporary upload directory. This can lead to remote code execution on WordPress systems that use NGINX or other non `.htaccess` respecting web servers. NOTE: During installation and activation, the Gravity Forms plugin places a `.htaccess` file in this directory, which prevents this vulnerability from being exploited despite the PHP file being written to the temporary upload directory. In these cases where PHP execution is blocked, attacker-written HTML can result in stored same-origin cross-site scripting if a victim visits the generated file URL.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 14:17 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Gravity Forms | Gravity Forms |
Affected:
0 , ≤ 3.0.2
(semver)
|
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Mitigation
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]
Mitigation MIT-21
Architecture and Design
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
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]
Mitigation MIT-5
Implementation
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
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.
Mitigation
Implementation
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
Implementation
When running on a web server that supports case-insensitive filenames, perform case-insensitive evaluations of the extensions that are provided.
Mitigation MIT-15
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.
Mitigation
Implementation
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
Implementation
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
Architecture and Design
Operation
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
Architecture and Design
Operation
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.