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.
6273 vulnerabilities reference this CWE, most recent first.
CVE-2026-82970 (GCVE-0-2026-82970)
Vulnerability from cvelistv5 – Published: 2026-08-31 14:43 – Updated: 2026-08-31 18:51 X_Open Source
VLAI
EPSS
VEX
Title
WordPress WP Cookie Notice for GDPR, CCPA & ePrivacy Consent plugin <= 4.4.1 - Arbitrary File Upload vulnerability
Summary
Unrestricted Upload of File with Dangerous Type vulnerability in WP Legal Pages WP Cookie Notice for GDPR, CCPA & ePrivacy Consent allows Using Malicious Files.
This issue affects WP Cookie Notice for GDPR, CCPA & ePrivacy Consent: from n/a through 4.4.1.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 15:23 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| WP Legal Pages | WP Cookie Notice for GDPR, CCPA & ePrivacy Consent |
Affected:
n/a , ≤ 4.4.1
(custom)
|
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CVE-2026-82921 (GCVE-0-2026-82921)
Vulnerability from cvelistv5 – Published: 2026-08-31 21:15 – Updated: 2026-09-01 16:00
VLAI
EPSS
VEX
Title
ShopEx ECShop pack.php check_img_type unrestricted upload
Summary
A weakness has been identified in ShopEx ECShop up to 2.5.1. This affects the function check_img_type of the file admin/pack.php. Executing a manipulation of the argument pack_img can lead to unrestricted upload. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 16:00 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/397301 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/397301/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-82921 | third-party-advisory |
| https://vuldb.com/submit/879229 | third-party-advisory |
| https://uvxbywu62qm.feishu.cn/wiki/TNENwNItlitygt… | exploit |
Impacted products
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CVE-2026-82679 (GCVE-0-2026-82679)
Vulnerability from cvelistv5 – Published: 2026-08-31 10:30 – Updated: 2026-09-02 13:44
VLAI
EPSS
VEX
Title
diem-project diem Widget Editor dmWidgetContentBaseMediaForm.php unrestricted upload
Summary
A security flaw has been discovered in diem-project diem up to 5.1.3. The impacted element is an unknown function of the file dmFrontPlugin/lib/dmWidget/media/dmWidgetContentBaseMediaForm.php of the component Widget Editor. Performing a manipulation results in unrestricted upload. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-02 13:44 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/397174 | vdb-entry |
| https://vuldb.com/vuln/397174/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-82679 | third-party-advisory |
| https://vuldb.com/submit/894026 | third-party-advisory |
| https://github.com/diem-project/diem/issues/448 | exploitissue-tracking |
| https://github.com/diem-project/diem/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| diem-project | diem |
Affected:
5.1.0
Affected: 5.1.1 Affected: 5.1.2 Affected: 5.1.3 cpe:2.3:a:diem-project:diem:*:*:*:*:*:*:*:* |
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CVE-2026-82629 (GCVE-0-2026-82629)
Vulnerability from cvelistv5 – Published: 2026-08-31 07:15 – Updated: 2026-08-31 22:03
VLAI
EPSS
VEX
Title
jeecgboot jeewx-boot doUpload Endpoint MyJwWebJwid3Controller.java MyJwWebJwid3Controller.doUpload unrestricted upload
Summary
A vulnerability was determined in jeecgboot jeewx-boot up to 641ab52c3e1845fec39996d7794c33fb40dad1dd. This issue affects the function MyJwWebJwid3Controller.doUpload of the file jeewx-boot-module-weixin/src/main/java/com/jeecg/p3/open/web/back/MyJwWebJwid3Controller.java of the component doUpload Endpoint. Executing a manipulation of the argument File can lead to unrestricted upload. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. The project was informed of the problem early through an issue report but has not responded yet.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 21:50 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/397127 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/397127/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-82629 | third-party-advisory |
| https://vuldb.com/submit/893778 | third-party-advisory |
| https://github.com/jeecgboot/jeewx-boot/issues/48 | exploitissue-tracking |
| https://github.com/jeecgboot/jeewx-boot/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jeecgboot | jeewx-boot |
Affected:
641ab52c3e1845fec39996d7794c33fb40dad1dd
cpe:2.3:a:jeecgboot:jeewx-boot:*:*:*:*:*:*:*:* |
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CVE-2026-82607 (GCVE-0-2026-82607)
Vulnerability from cvelistv5 – Published: 2026-08-31 02:30 – Updated: 2026-08-31 16:07
VLAI
EPSS
VEX
Title
Cozmoslabs Profile Builder Plugin Avatar Simple Upload AJAX admin-ajax.php wppb_ajax_simple_avatar unrestricted upload
Summary
A vulnerability was found in Cozmoslabs Profile Builder Plugin up to 3.16.1 on WordPress. The impacted element is the function wppb_ajax_simple_avatar of the file /wp-admin/admin-ajax.php of the component Avatar Simple Upload AJAX Handler. Performing a manipulation results in unrestricted upload. The attack is possible to be carried out remotely. The exploit has been made public and could be used. Upgrading to version 3.16.2 is sufficient to resolve this issue. It is suggested to upgrade the affected component.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 16:07 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/397108 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/397108/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-82607 | third-party-advisory |
| https://vuldb.com/submit/892841 | third-party-advisory |
| https://ciphersecuritylabs.com/research/articles/… | exploit |
| https://www.cozmoslabs.com/docs/profile-builder/f… | patchrelease-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cozmoslabs | Profile Builder Plugin |
Affected:
3.16.0
Affected: 3.16.1 Unaffected: 3.16.2 cpe:2.3:a:cozmoslabs:profile_builder_plugin:*:*:*:*:*:*:*:* |
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CVE-2026-82524 (GCVE-0-2026-82524)
Vulnerability from cvelistv5 – Published: 2026-09-02 19:34 – Updated: 2026-09-04 16:41 X_Open Source
VLAI
EPSS
VEX
Title
UnoPim File Upload RCE via TinyMCE Image Upload Endpoint
Summary
UnoPim before 2.1.5 contains an authenticated file upload vulnerability that allows authenticated administrators to upload arbitrary PHP files through the TinyMCE image upload endpoint due to missing file extension and MIME type validation. Attackers can upload a PHP web shell to the public storage disk and execute arbitrary operating system commands on the server by accessing the uploaded file at the URL returned in the server response.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 12:52 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/unopim/unopim/releases/tag/v2.1.5 | release-notes |
| https://github.com/unopim/unopim/commit/675dfb515… | patch |
| https://ashutosh-jena.in/blog/remote-code-executi… | technical-descriptionexploit |
| https://www.vulncheck.com/advisories/unopim-file-… | third-party-advisory |
Date Public
2026-06-10 00:00
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CVE-2026-82450 (GCVE-0-2026-82450)
Vulnerability from cvelistv5 – Published: 2026-08-29 13:47 – Updated: 2026-08-31 18:21
VLAI
EPSS
VEX
Title
BookStack before 26.05.4 Remote Code Execution via Book Cover
Summary
BookStack before 26.05.4 contains a remote code execution vulnerability in the portable ZIP import functionality that allows users with Import Content and Create Books permissions to upload a PHP polyglot file as a book cover. Attackers can bypass image extension validation by embedding a PHP file with a .php filename in the ZIP archive, which is stored in the public web root and executed by unauthenticated requests.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:21 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/BookStackApp/BookStack/commit/… | patch |
| https://github.com/BookStackApp/BookStack | product |
| https://www.vulncheck.com/advisories/bookstack-be… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| bookstackapp | bookstack |
Affected:
0 , < 26.05.4
(custom)
cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:* |
Date Public
2026-08-22 00:00
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CVE-2026-81931 (GCVE-0-2026-81931)
Vulnerability from cvelistv5 – Published: 2026-08-27 19:33 – Updated: 2026-08-28 15:36 X_Open Source
VLAI
EPSS
VEX
Title
Unrestricted upload of file with dangerous type in Prospero Flow CRM product photo allows stored cross-site scripting
Summary
Unrestricted Upload of File with Dangerous Type in the product photo upload in Roskus Prospero Flow CRM before 5.16.0 allows an authenticated user holding the create product permission (routine Seller role) to execute arbitrary JavaScript in the application origin. The photo validation rule classifies the file only by its content (magic bytes) and rejects only a fixed list of PHP extensions, while ProductSaveController::save() names the stored file using the client-supplied extension and copies it into the public web root. A file that begins with an image header and carries an HTML extension passes validation, is stored under public/asset/upload/product/, and is served with a text/html content type, turning the upload into first-party stored script execution.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 15:35 UTC
CWE
- CWE-434 - Unrestricted upload of file with dangerous type
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Roskus/prospero-flow-crm/commi… | patch |
| https://secur0.com/en/cna/cve-list/cve-2026-81931… | third-party-advisorytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Roskus | Prospero Flow CRM |
Affected:
0 , < 5.16.0
(semver)
cpe:2.3:a:roskus:prospero_flow_crm:*:*:*:*:*:*:*:* |
Date Public
2026-08-27 00:00
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CVE-2026-81891 (GCVE-0-2026-81891)
Vulnerability from cvelistv5 – Published: 2026-08-31 20:33 – Updated: 2026-09-01 14:58
VLAI
EPSS
VEX
Title
elFinder: ZIP extraction bypasses uploadDeny MIME filter allowing PHP file upload (RCE)
Summary
elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, checkExtractItems() in php/elFinderVolumeDriver.class.php calls mimetypeInternalDetect() without passing the result through mimeTypeNormalize(). Because the .phtml, .phar, .php5, and .php3 extensions are absent from mime.types, the staticMimeMap entries that map them to text/x-php are not applied, and allowPutMime() permits extraction even when uploadDeny blocks text/x-php. An attacker with ZIP upload permission can extract PHP-executable files into a web-accessible files/ directory and achieve remote code execution when the server executes those extensions. This issue is fixed in version 2.1.70.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 14:16 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Studio-42/elFinder/security/ad… | x_refsource_CONFIRM |
| https://github.com/Studio-42/elFinder/commit/1913… | x_refsource_MISC |
| https://github.com/Studio-42/elFinder/commit/dd73… | x_refsource_MISC |
| https://github.com/Studio-42/elFinder/releases/ta… | x_refsource_MISC |
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CVE-2026-81780 (GCVE-0-2026-81780)
Vulnerability from cvelistv5 – Published: 2026-08-31 20:30 – Updated: 2026-09-01 18:11
VLAI
EPSS
VEX
Title
WordPress Hash Form plugin <= 1.4.2 - Arbitrary File Upload vulnerability
Summary
Unauthenticated Arbitrary File Upload in Hash Form <= 1.4.2 versions.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 18:10 UTC
CWE
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| hashthemes | Hash Form |
Affected:
n/a , ≤ 1.4.2
(custom)
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],
"value": "Update the WordPress Hash Form Plugin to the latest available version (at least 1.4.3)."
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "WordPress Hash Form plugin \u003c= 1.4.2 - Arbitrary File Upload vulnerability",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3",
"assignerShortName": "Patchstack",
"cveId": "CVE-2026-81780",
"datePublished": "2026-08-31T20:30:52.324Z",
"dateReserved": "2026-08-27T12:24:25.082Z",
"dateUpdated": "2026-09-01T18:11:04.583Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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.