fangtang7 ApiAdmin up to 5.0 File Upload /admin/Index/upload move_uploaded_file path traversal

Summaryinfo

A vulnerability described as problematic has been identified in fangtang7 ApiAdmin up to 5.0. The affected element is the function move_uploaded_file of the file /admin/Index/upload of the component File Upload. The manipulation results in path traversal. This vulnerability was named CVE-2026-88396. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in fangtang7 ApiAdmin up to 5.0. It has been classified as problematic. Affected is the function move_uploaded_file of the file /admin/Index/upload of the component File Upload. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

ApiAdmin v5.0 and before is vulnerable to Directory Traversal. The admin file-upload endpoint POST /admin/Index/upload in ApiAdmin takes the uploaded file's extension verbatim there is no whitelist, blacklist or content check and move_uploaded_file() drops the file into the web-accessible directory public/upload/Ymd/. Any logged-in admin user can upload a .php file and reach it directly over HTTP, achieving remote code execution on the server.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-88396 since 09/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are necessary for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/05/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• fangtang7

Name

• ApiAdmin

Version

• 5.0

CPE 2.3info

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CPE 2.2info

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