Exploitation Summary
EIP tracks 2 public exploits for CVE-2026-27825. PoCs published by plutosecurity, romain-deperne.
AI-analyzed exploit summary This repository provides a detection script for CVE-2026-27825 and CVE-2026-27826 in mcp-atlassian, which scans for vulnerable installations but does not include exploit code. It includes technical details about the vulnerabilities but no functional exploit.
Description
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to version 0.17.0, the `confluence_download_attachment` MCP tool accepts a `download_path` parameter that is written to without any directory boundary enforcement. An attacker who can call this tool and supply or access a Confluence attachment with malicious content can write arbitrary content to any path the server process has write access to. Because the attacker controls both the write destination and the written content (via an uploaded Confluence attachment), this constitutes for arbitrary code execution (for example, writing a valid cron entry to `/etc/cron.d/` achieves code execution within one scheduler cycle with no server restart required). Version 0.17.0 fixes the issue.
Exploits (2)
This repository provides a detection script for CVE-2026-27825 and CVE-2026-27826 in mcp-atlassian, which scans for vulnerable installations but does not include exploit code. It includes technical details about the vulnerabilities but no functional exploit.
This repository contains a functional exploit PoC for CVE-2026-27825, a path traversal vulnerability in `sooperset/mcp-atlassian` that allows arbitrary file reads via the `confluence_upload_attachment` tool. The PoC includes a real MCP stdio client, a mock Confluence endpoint, and a script to reproduce the vulnerability end-to-end.
References (2)
Scores
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H