Unrestricted File Upload Vulnerability in Feiyuchuixue Sz-Boot-Parent
CVE-2026-3187

5.3MEDIUM

Key Information:

Vendor

Feiyuchuixue

Status
Sz-boot-parent
Vendor
CVE Published:
25 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3187?

A vulnerability exists in the Feiyuchuixue sz-boot-parent component, specifically affecting the API endpoint /api/admin/sys-file/upload. This vulnerability permits unrestricted file uploads, potentially allowing attackers to exploit the system remotely. Affected versions up to 1.3.2-beta are susceptible to this issue, with an available public exploit. It is highly recommended to upgrade to version 1.3.3-beta, which introduces a whitelist restriction for the upload endpoint using allowed extensions and MIME types to enhance security.

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Affected Version(s)

sz-boot-parent 1.3.2-beta

sz-boot-parent 1.3.3-beta

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-3187 - Proof of Concept

References

https://vuldb.com/?id.347745
vdb-entry
https://vuldb.com/?ctiid.347745
signaturepermissions-required
https://vuldb.com/?submit.754038
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

yuccun (VulDB User)
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