Vulnerability · Published Nov 19, 2025 · Assigned by VulnCheck
CVE-2025-34337eGovFramework <= 4.3.1 Unauthenticated Encryption Oracle via Web Editor Image Upload Endpoints
High 8.7
In plain English
A high-severity insufficient verification of data authenticity 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 0.2% (higher than 13% of all known vulnerabilities).
Official description
eGovFramework/egovframe-common-components versions up to and including 4.3.1 includes Web Editor image upload and related file delivery functionality that uses symmetric encryption to protect URL parameters, but exposes an encryption oracle that allows attackers to generate valid ciphertext for chosen values. The image upload endpoints /utl/wed/insertImage.do and /utl/wed/insertImageCk.do encrypt server-side paths, filenames, and MIME types and embed them directly into a download URL that is returned to the client. Because these same encrypted parameters are trusted by other endpoints, such as /utl/web/imageSrc.do and /cmm/fms/getImage.do, an unauthenticated attacker can abuse the upload functionality to obtain encrypted representations of attacker-chosen identifiers and then replay those ciphertext values to file-serving APIs. This design failure allows an attacker to bypass access controls that rely solely on the secrecy of encrypted parameters and retrieve arbitrary stored files that are otherwise expected to require an existing session or specific authorization context. KISA/KrCERT has identified this unpatched vulnerability as "KVE-2023-5281."
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| eGovFramework/egovframe-common-components | eGovFramework/egovframe-common-components | 0 – through 4.3.1 |
Weakness: CWE-345 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/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-encryption-oracle-via-web-editor-image-upload-endpoints third-party-advisory