How severe is CVE-2025-9400?

CVE-2025-9400 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-2025-9400 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-9400?

CVE-2025-9400 affects Wanglongcn Yifang. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-9400?

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

Does CVE-2025-9400 have an EU (EUVD) identifier?

Yes. CVE-2025-9400 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25653.

When was CVE-2025-9400 published?

CVE-2025-9400 was published on 2025-08-25 and last updated on 2026-06-17.

CVE-2025-9400

CVE-2025-9400 is a medium-severity vulnerability in Wanglongcn Yifang 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-284.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25653
Weakness: CWE-284
Affected product: Wanglongcn Yifang
Published: 2025-08-25
Last modified: 2026-06-17

Description

A flaw has been found in YiFang CMS up to 2.0.5. This affects the function mergeMultipartUpload of the file app/utils/base/plugin/P_file.php. This manipulation of the argument File causes unrestricted upload. Remote exploitation of the attack is possible. The exploit has been published 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-2025-9400?: A flaw has been found in YiFang CMS up to 2.0.5. This affects the function mergeMultipartUpload of the file app/utils/base/plugin/P_file.php. This manipulation of the argument File causes unrestricted upload. Remote exploitation of the attack is possible. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2025-9400?: CVE-2025-9400 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-2025-9400 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-9400?: CVE-2025-9400 affects Wanglongcn Yifang. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-9400?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-9400 have an EU (EUVD) identifier?: Yes. CVE-2025-9400 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25653.
When was CVE-2025-9400 published?: CVE-2025-9400 was published on 2025-08-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wanglongcn:yifang:*:*:*:*:*:*:*:*

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