Vulnerability · Published May 11, 2025 · Assigned by VulDB

CVE-2025-4538kkFileView fileUpload unrestricted upload

Medium 6.3

In plain English

A medium-severity unrestricted file upload in kkFileView. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.4%top 62.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was found in kkFileView 4.4.0. It has been classified as critical. This affects an unknown part of the file /fileUpload. The manipulation of the argument File leads to unrestricted upload. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products (as reported)

Vendor	Product	Versions
n/a	kkFileView	4.4.0

Weakness: CWE-434, CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

References

VDB-308283 | kkFileView fileUpload unrestricted upload vdb-entry, technical-description
VDB-308283 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #566596 | kkFileView 4.4.0 Arbitrary File Writing third-party-advisory
https://magnificent-dill-351.notion.site/Arbitrary-File-Upload-in-kkFileView-4-4-0-1e3c693918ed802581faccab9140a130 exploit