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CVE-2026-4830— kalcaddle kodbox Public Share userShare.class.php add privilege escalation

Quick assessment

Affected
kalcaddle kodbox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kalcaddle Kodbox是中国可道云（Kalcaddle）公司的一个私有云存储与在线协同办公平台。 kalcaddle kodbox 1.64版本存在代码问题漏洞，该漏洞源于对文件app/controller/explorer/userShare.class.php中Add函数的操作导致上传不受限制，可能导致任意文件上传。

CVSS 5.6 · Medium EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1105 · Ingress Tool Transfer
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I. Basic Information for CVE-2026-4830

Vulnerability Information
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Vulnerability Title
kalcaddle kodbox Public Share userShare.class.php add privilege escalation
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in kalcaddle kodbox 1.64. This issue affects the function Add of the file app/controller/explorer/userShare.class.php of the component Public Share Handler. Such manipulation leads to unrestricted upload. The attack can be executed remotely. This attack is characterized by high complexity. The exploitability is assessed as difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Kalcaddle Kodbox 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kalcaddle Kodbox是中国可道云（Kalcaddle）公司的一个私有云存储与在线协同办公平台。 kalcaddle kodbox 1.64版本存在代码问题漏洞，该漏洞源于对文件app/controller/explorer/userShare.class.php中Add函数的操作导致上传不受限制，可能导致任意文件上传。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
kalcaddle kodbox 1.64 -

II. Public POCs for CVE-2026-4830

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III. Intelligence Information for CVE-2026-4830

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Vendor Advisories for CVE-2026-4830 (2)

Proof of Concept for CVE-2026-4830 (1)

IV. Related Vulnerabilities

Same product: kodbox
Same vendor: kalcaddle
Same weakness: CWE-434

V. Comments for CVE-2026-4830

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