Arbitrary file upload in Wanglongcn Yifang
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (23.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Wanglongcn Yifang
- Yifang Cms — versions 2.0.0, 2.0.1, 2.0.2
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/August829/Yu/blob/main/20250811_3.md (related, Broken Link)
- github.com/August829/Yu/blob/main/20250811_3.md (exploit, Broken Link)
Frequently asked questions
- What is CVE-2025-9400?
- CVE-2025-9400 is a medium-severity vulnerability in Wanglongcn Yifang, classified under Improper Access Control. CVSS score: 6.3/10. Published 2025-08-25.
- How severe is CVE-2025-9400?
- Medium severity. CVSS v3 base score is 6.3 out of 10.