Is this vulnerability remotely exploitable?

Yes, if the MCP server is accessible over the network and the attacker can invoke the `confluence_download_attachment` tool, it can be exploited remotely within the boundaries of the server's filesystem permissions.

What level of access does an attacker need?

An attacker must be able to: - Call the `confluence_download_attachment` tool (directly or via an integrated agent), and - Control or supply a Confluence attachment whose contents will be downloaded. They do not need shell access to the server; the tool call is the primary access vector.

What is the safest general fix pattern for developers?

Constrain all file writes to a dedicated, non-executable storage directory and enforce robust path validation that prevents escaping that directory. Use well-reviewed helper functions or middleware that normalize paths and reject absolute or traversal-based locations, instead of handling file paths ad hoc in each tool.

Severity:

CRITICAL RISK

(9.0)

Path Traversal File Write (CWE-22/CWE-73) in MCP Atlassian confluence_download_attachment Tool

CVE-2026-27825

Published:

Mar 10, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-918

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

Unauthorized Access to Internal Resources via SSRF

May 6, 2026

CWE-863

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Privilege Escalation via Bypassed Access Control

May 6, 2026

Vulnerability Type

Category:

Path Traversal and Arbitrary File Write

CWE:

CWE-22;CWE-73

Impact:

Arbitrary File Write leading to Remote Code Execution

Severity:

CRITICAL RISK

(9.0)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal and Arbitrary File Write

CWE:

CWE-22;CWE-73

Impact:

Arbitrary File Write leading to Remote Code Execution

Severity:

CRITICAL RISK

(9.0)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.

Get Started

Ship clean & secure code faster

Start Free Trial

Get Pentest Report

Ship clean & secure code faster

Start Free Trial

Get Pentest Report

Ship clean & secure code faster

Start Free Trial

Get Pentest Report

CodeAnt AI is an offensive and defensive security platform.

Defensive + offensive security.

From first line of code to a pentest
that knows every line of it.

SOC 2 Type II certified | CodeAnt AI is independently audited and compliant with SOC 2 Type II security standards

Ask AI for summary of CodeAnt

Defensive + offensive security.

From first line of code to a pentest
that knows every line of it.

Ask AI for summary of CodeAnt

Defensive + offensive security.

From first line of code to a pentest
that knows every line of it.

Ask AI for summary of CodeAnt

Path Traversal File Write (CWE-22/CWE-73) in MCP Atlassian confluence_download_attachment Tool

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

Product

Compare

Company

Developers

Legal

Product

Compare

Company

Developers

Legal

Product

Compare

Company

Developers

Legal