baryhuang mcp-server-aws-resources-python up to 0.1.0 Environment Variable exec code injection

Summaryinfo

A vulnerability labeled as critical has been found in baryhuang mcp-server-aws-resources-python up to 0.1.0. Affected is the function exec of the component Environment Variable Handler. Such manipulation leads to code injection. This vulnerability is traded as CVE-2025-63604. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in baryhuang mcp-server-aws-resources-python up to 0.1.0. Affected by this issue is the function exec of the component Environment Variable Handler. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A code injection vulnerability exists in baryhuang/mcp-server-aws-resources-python 0.1.0 that allows remote code execution through insufficient input validation in the execute_query method. The vulnerability stems from the exposure of dangerous Python built-in functions (__import__, getattr, hasattr) in the execution namespace and the direct use of exec() to execute user-supplied code. An attacker can craft malicious queries to execute arbitrary Python code, leading to AWS credential theft (AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY), file system access, environment variable disclosure, and potential system compromise. The vulnerability allows attackers to bypass intended security controls and gain unauthorized access to sensitive AWS resources and credentials stored in the server's environment.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2025-63604 since 10/27/2025. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/18/2025). The MITRE ATT&CK project declares the attack technique as T1059.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Programming Language Software

Vendor

• baryhuang

Name

• mcp-server-aws-resources-python

Version

• 0.1.0

Website

• Product: https://github.com/baryhuang/mcp-server-aws-resources-python/

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