Vulnerability · Published Nov 19, 2025 · Assigned by VulnCheck
CVE-2025-34336eGovFramework <= 4.3.1 Unauthenticated File Upload via Web Editor Image Upload Endpoints
Medium 6.9
In plain English
A medium-severity unrestricted file upload in eGovFramework/egovframe-common-components from eGovFramework/egovframe-common-components. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Official description
eGovFramework/egovframe-common-components versions up to and including 4.3.1 contain an unauthenticated file upload vulnerability via the /utl/wed/insertImage.do and /utl/wed/insertImageCk.do image upload endpoints. These controllers accept multipart requests without authentication, pass the uploaded content to a shared upload helper, and store the file on the server under a framework-controlled path. The framework then returns a download URL that can be used to retrieve the uploaded content, including an attacker-controlled Content-Type within the limits of the image upload functionality. While a filename extension whitelist is enforced, the attacker fully controls the file contents. The response MIME type used is also attacker-controlled when the file is served up to version < 4.1.2. Since version 4.1.2, it is possible to download any image uploaded with any whitelisted content type. But any file uploaded other than an image will be served with the `application/octet-stream` content type (the content type is no longer controlled by the attacker since version 4.1.2). This enables an unauthenticated attacker to use any affected application as a persistent file hosting service for arbitrary content under the application's origin. KISA/KrCERT has identified this unpatched vulnerability as "KVE-2023-5280."
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| eGovFramework/egovframe-common-components | eGovFramework/egovframe-common-components | 0 – through 4.3.1 |
Weakness: CWE-434 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
References
- https://www.egovframe.go.kr/eng/sub.do?menuNo=2 product
- https://github.com/eGovFramework/egovframe-common-components product
- https://pierrekim.github.io/blog/2025-11-20-egovframe-2-vulnerabilities.html technical-description, exploit
- https://pierrekim.github.io/advisories/2025-egovframe.txt technical-description, exploit
- https://www.vulncheck.com/advisories/egovframework-unauthenticated-file-upload-via-web-editor-image-upload-endpoints third-party-advisory