CVE-2026-27825
CriticalSummary
MCP Atlassian to serwer Model Context Protocol (MCP) dla produktów Atlassian (Confluence i Jira). W wersjach przed 0.17.0 narzędzie `confluence_download_attachment` akceptuje parametr `download_path`, który nie jest odpowiednio zabezpieczony przed zapisem w nieautoryzowanych lokalizacjach, co pozwala atakującemu na wykonanie dowolnego kodu.
Risk Assessment
Atakujący, mając dostęp do narzędzia, może zapisać złośliwe treści w dowolnej lokalizacji, do której proces serwera ma dostęp do zapisu, co stwarza poważne zagrożenie dla bezpieczeństwa systemu.
Recommendation
Zaleca się aktualizację do wersji 0.17.0 lub nowszej, aby usunąć tę podatność oraz wprowadzenie dodatkowych zabezpieczeń w celu ograniczenia dostępu do narzędzi MCP.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS