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CVE-2026-3405— thinkgem JeeSite Connection path traversal

Quick assessment

Affected
thinkgem JeeSite
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.

JeeSite是济南卓源（thinkgem）开源的一个Java快速开发平台。 JeeSite 5.15.1及之前版本存在安全漏洞，该漏洞源于对连接处理器组件的操作，可能导致路径遍历攻击。

CVSS 3.1 · Low EPSS 0.58% · P45

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2026-3405

Vulnerability Information
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Vulnerability Title
thinkgem JeeSite Connection path traversal
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in thinkgem JeeSite up to 5.15.1. The affected element is an unknown function of the component Connection Handler. The manipulation leads to path traversal. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The exploit has been disclosed to the public and may 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:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
JeeSite 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
JeeSite是济南卓源（thinkgem）开源的一个Java快速开发平台。 JeeSite 5.15.1及之前版本存在安全漏洞，该漏洞源于对连接处理器组件的操作，可能导致路径遍历攻击。
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
thinkgem JeeSite 5.15.0 cpe:2.3:a:jeesite:jeesite:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-3405

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III. Intelligence Information for CVE-2026-3405

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Vendor Advisories for CVE-2026-3405 (2)

IV. Related Vulnerabilities

Same product: JeeSite
Same vendor: thinkgem
Same weakness: CWE-22

V. Comments for CVE-2026-3405

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