CVE-2025-4538

Name: CVE-2025-4538
Creator: NVD / NIST
Published: 2025-05-11T11:15:50.68+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2025-4538 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A vulnerability was found in kkFileView 4.4.0. It has been classified as critical. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

5.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.34%

25.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Keking	Kkfileview	4.4.0

References

https://magnificent-dill-351.notion.site/Arbitrary-File-Upload-in-kkFileView-4-4-0-1e3c693918ed802581faccab9140a130Broken Link
https://vuldb.com/?ctiid.308283Permissions Required, VDB Entry
https://vuldb.com/?id.308283Third Party Advisory, VDB Entry
https://vuldb.com/?submit.566596Third Party Advisory, VDB Entry
https://magnificent-dill-351.notion.site/Arbitrary-File-Upload-in-kkFileView-4-4-0-1e3c693918ed802581faccab9140a130Broken Link

Timeline

Published: May 11, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-4538?

How severe is CVE-2025-4538?

CVE-2025-4538 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2025-4538?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-4538?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST