CVE-2025-53109— Model Context Protocol Servers Vulnerable to Path Validation Bypass via Prefix Matching and Symlink Handling
Quick assessment
Affected
modelcontextprotocol servers
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.
Model Context Protocol Servers是Model Context Protocol开源的一个大模型上下文协议服务器。 Model Context Protocol Servers 0.6.4之前版本和2025.7.01之前版本存在后置链接漏洞，该漏洞源于符号链接可能导致访问意外文件。
Possible ATT&CK Techniques 1 AI
T1552.004 · Private Keys
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I. Basic Information for CVE-2025-53109
Vulnerability Information
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Vulnerability Title
Model Context Protocol Servers Vulnerable to Path Validation Bypass via Prefix Matching and Symlink Handling
Source: CVE Program / CVE List V5
Vulnerability Description
Model Context Protocol Servers is a collection of reference implementations for the model context protocol (MCP). Versions of Filesystem prior to 0.6.4 or 2025.7.01 could allow access to unintended files via symlinks within allowed directories. Users are advised to upgrade to 0.6.4 or 2025.7.01 resolve.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
Model Context Protocol Servers 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Model Context Protocol Servers是Model Context Protocol开源的一个大模型上下文协议服务器。 Model Context Protocol Servers 0.6.4之前版本和2025.7.01之前版本存在后置链接漏洞，该漏洞源于符号链接可能导致访问意外文件。
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 |
|---|---|---|---|---|
| modelcontextprotocol | servers | < 0.6.4 | - |
|
II. Public POCs for CVE-2025-53109
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2025-53109 (1)
IV. Related Vulnerabilities
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V. Comments for CVE-2025-53109
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