Path traversal in ApiAdmin file upload allows remote code execution
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
ApiAdmin v5.0 and before contains a path traversal flaw (CWE-22) in its admin file-upload endpoint POST /admin/Index/upload. The endpoint accepts any file extension without a whitelist, blacklist or content check and stores uploads in the web accessible directory public/upload/Ymd/. Any logged in admin user can upload a .php file and access it over HTTP, executing code on the server.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for ApiAdmin.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-05 Threatist record created from CVE-2026-88396
- 2026-10-05 Alias added: GHSA-6jhf-4357-9q99
- 2026-10-07 EPSS moved to the 50th–90th percentile
- 2026-10-07 CVSS score added · CISA ADP
- 2026-10-07 Weakness changed · CISA ADP
- 2026-10-07 CISA SSVC decision points changed
References
Sources
- CVE-2026-88396 · CVE Program
- CVE-2026-88396 · NVD
- FIRST EPSS
- GHSA-6jhf-4357-9q99 · GitHub Advisory Database · CC BY 4.0
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