How severe is CVE-2025-4538?

CVE-2025-4538 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-4538 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-4538?

CVE-2025-4538 affects Keking Kkfileview. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-4538?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-4538 have an EU (EUVD) identifier?

Yes. CVE-2025-4538 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14254.

When was CVE-2025-4538 published?

CVE-2025-4538 was published on 2025-05-11 and last updated on 2026-06-17.

CVE-2025-4538

CVE-2025-4538 is a medium-severity vulnerability in Keking Kkfileview with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 5.3
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-14254
Weakness: CWE-434
Affected product: Keking Kkfileview
Published: 2025-05-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-4538?: 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.
How severe is CVE-2025-4538?: CVE-2025-4538 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-4538 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-4538?: CVE-2025-4538 affects Keking Kkfileview. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-4538?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-4538 have an EU (EUVD) identifier?: Yes. CVE-2025-4538 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14254.
When was CVE-2025-4538 published?: CVE-2025-4538 was published on 2025-05-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:keking:kkfileview:4.4.0:*:*:*:*:*:*:*

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