{"items":[{"id":"NVI-00013877","kind":"vulnerability","title":"MCP Atlassian: Jira and Confluence attachment upload tools can read arbitrary server-local files","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vc25-24vv-fxxm","CVE-2026-77253"],"plain_summary":"GitHub lists this reviewed advisory for mcp-atlassian. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-07853bec45914c729ae76dd006372e40"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-09-22T20:34:51.000Z","value":"7.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-14ac288da46c85e3c7d7217ef2cbdef3"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.444%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.38672. Missing scores are unknown.","source_id":"sr-07853bec45914c729ae76dd006372e40"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-14ac288da46c85e3c7d7217ef2cbdef3","url":"https://github.com/advisories/GHSA-vc25-24vv-fxxm","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vc25-24vv-fxxm","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T14:29:31.527Z"},{"id":"sr-07853bec45914c729ae76dd006372e40","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-77253","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:45:16.081Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-14ac288da46c85e3c7d7217ef2cbdef3"],"technology":"mcp-atlassian","known_exclusions":[],"conditions_summary":"### Summary\n\nMCP Atlassian exposes Jira and Confluence attachment upload tools that accept arbitrary local filesystem paths and upload those file contents to Atlassian. In HTTP or multi-user deployments, an MCP caller who can invoke write tools can cause the server to read any file accessible to the MCP process and send it to Jira/Confluence as an attachment.\n\n### Details\n\nThe Confluence MCP upload tool accepts a `file_path` described as an absolute or relative server path in `src/mcp_atlassian/servers/confluence.py:1290-1316` and forwards it directly to `confluence_fetcher.upload_attachment()` in `src/mcp_atlassian/servers/confluence.py:1356-1363`. The multi-upload variant accepts comma-separated local paths in `src/mcp_atlassian/servers/confluence.py:1372-1449`.\n\nThe Confluence attachment implementation converts relative paths to absolute paths, checks only existence, and then opens the path for upload. There is no call to `validate_safe_path()` or any allowed directory check for uploads in `src/mcp_atlassian/confluence/attachments.py:61-79`; the direct upload path opens the file with `open(file_path, \"rb\")` in `src/mcp_atlassian/confluence/attachments.py:467-490`.\n\nThe Jira uplo","public_affected_ranges":["< 0.22.0"]}],"null_published_at":"2026-11-04T10:04:41.556Z","source_updated_at":"2026-09-22T20:34:51.000Z","source_disclosed_at":"2026-09-22T20:34:50.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-01T14:29:31.527Z"},{"id":"NVI-00013877","kind":"vulnerability","title":"MCP Atlassian: Jira and Confluence attachment upload tools can read arbitrary server-local files","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vc25-24vv-fxxm","CVE-2026-77253"],"plain_summary":"GitHub lists this reviewed advisory for mcp-atlassian. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-14ac288da46c85e3c7d7217ef2cbdef3"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-09-22T20:34:51.000Z","value":"7.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-14ac288da46c85e3c7d7217ef2cbdef3"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-14ac288da46c85e3c7d7217ef2cbdef3","url":"https://github.com/advisories/GHSA-vc25-24vv-fxxm","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-vc25-24vv-fxxm","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T14:29:31.527Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-14ac288da46c85e3c7d7217ef2cbdef3"],"technology":"mcp-atlassian","known_exclusions":[],"conditions_summary":"### Summary\n\nMCP Atlassian exposes Jira and Confluence attachment upload tools that accept arbitrary local filesystem paths and upload those file contents to Atlassian. In HTTP or multi-user deployments, an MCP caller who can invoke write tools can cause the server to read any file accessible to the MCP process and send it to Jira/Confluence as an attachment.\n\n### Details\n\nThe Confluence MCP upload tool accepts a `file_path` described as an absolute or relative server path in `src/mcp_atlassian/servers/confluence.py:1290-1316` and forwards it directly to `confluence_fetcher.upload_attachment()` in `src/mcp_atlassian/servers/confluence.py:1356-1363`. The multi-upload variant accepts comma-separated local paths in `src/mcp_atlassian/servers/confluence.py:1372-1449`.\n\nThe Confluence attachment implementation converts relative paths to absolute paths, checks only existence, and then opens the path for upload. There is no call to `validate_safe_path()` or any allowed directory check for uploads in `src/mcp_atlassian/confluence/attachments.py:61-79`; the direct upload path opens the file with `open(file_path, \"rb\")` in `src/mcp_atlassian/confluence/attachments.py:467-490`.\n\nThe Jira uplo","public_affected_ranges":["< 0.22.0"]}],"null_published_at":"2026-11-02T10:00:37.166Z","source_updated_at":"2026-09-22T20:34:51.000Z","source_disclosed_at":"2026-09-22T20:34:50.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-01T14:29:31.527Z"}],"next_cursor":null,"snapshot_revision":"42594"}