CVE-2025-71427

Received Received - Intake

Path Traversal in Office PowerPoint MCP Server

Publication date: 2026-10-01

Last updated on: 2026-10-01

Assigner: VulnCheck

Description

Office-PowerPoint-MCP-Server through 2.0.7 contains a path traversal vulnerability that allows MCP callers to write and read files outside the working directory by supplying absolute paths or ../ sequences. Attackers can steer an AI agent via prompt injection to abuse save_presentation, open_presentation, or manage_image output_path to overwrite any server-writable file or load external files.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-01

Last Modified

2026-10-01

Generated

2026-10-02

AI Q&A

2026-10-02

EPSS Evaluated

N/A

NVD

CVE-2025-71427

EUVD

EUVD-2025-211024

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-22	The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

Executive Summary

Office-PowerPoint-MCP-Server through version 2.0.7 has a path traversal flaw. This allows attackers to use prompt injection to manipulate MCP callers into writing or reading files outside the intended directory by using absolute paths or ../ sequences. Functions like save_presentation, open_presentation, or manage_image can be abused to overwrite server files or load external files.

Detection Guidance

To detect this vulnerability, monitor for unusual file access or modification patterns in the Office-PowerPoint-MCP-Server directory. Check for MCP calls using absolute paths or ../ sequences in parameters like save_presentation, open_presentation, or manage_image output_path. Review server logs for unauthorized file reads or writes outside the intended directory.

Impact Analysis

An attacker could overwrite critical server files, leading to system compromise or data loss. They might also read sensitive files, exposing confidential information. If the server hosts AI agents, prompt injection could steer them into performing unintended actions, such as saving files to unauthorized locations.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection requirements or HIPAA's safeguards for protected health information. Non-compliance may result in legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Immediately update Office-PowerPoint-MCP-Server to version 2.0.8 or later. Restrict file system permissions to limit write access to only necessary directories. Implement input validation to block absolute paths or ../ sequences in MCP calls. Monitor for suspicious activity and isolate affected systems if compromised.

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