{"schema":"threatline.record/2","record":{"id":"CVE-2026-53711","aliases":["GHSA-x6gc-rm5j-55mw"],"summary":"MCP ContextForge: Global Prompts stored cross-site scripting compromises the Admin UI","details":"MCP Context Forge provides an MCP Admin UI for managing gateway resources. From 0.2.0 until 0.3.1, the Global Prompts feature stores a prompt template without sufficient output encoding before the MCP Admin UI renders it. An authenticated attacker can save markup containing script-capable event handlers, and the code executes when another user views the saved prompt. The stored cross-site scripting can alter the interface, present phishing content, observe keystrokes available to the page, and act with the viewer's browser session. This issue is fixed in version 0.3.1.","categories":["Unclassified"],"product":"mcp-context-forge","vendor":"IBM","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-53711","source_modified_at":"2026-10-13T15:48:27.245Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"mcp-context-forge","vendor":"IBM","versions":[{"status":"affected","version":">= 0.2.0, < 0.3.1"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/IBM/mcp-context-forge/security/advisories/GHSA-x6gc-rm5j-55mw","source_modified_at":"2026-06-15T10:06:51Z","fetched_at":"2026-10-23T20:00:35.122048Z","package":{"ecosystem":"","name":"mcp-context-forge-ui"},"range":"0.2.0"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/IBM/mcp-context-forge/security/advisories/GHSA-x6gc-rm5j-55mw","source_modified_at":"2026-06-15T10:06:51Z","fetched_at":"2026-10-23T20:00:35.122048Z","package":{"ecosystem":"","name":"mcp-context-forge-ui"},"version":"0.3.1"}],"cvss":5.1,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00363,"percentile":0.28919,"score_date":"2026-10-23"},"published_at":"2026-10-13T14:34:01.069Z","modified_at":"2026-10-13T15:48:27.245Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-53711","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-13T15:48:27.245Z"},{"source":"GitHub Advisory Database","url":"https://github.com/IBM/mcp-context-forge/security/advisories/GHSA-x6gc-rm5j-55mw","fetched_at":"2026-10-23T20:00:35.122048Z","source_modified_at":"2026-06-15T10:06:51Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-53711","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/IBM/mcp-context-forge/security/advisories/GHSA-x6gc-rm5j-55mw","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/IBM/mcp-context-forge/pull/337","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/IBM/mcp-context-forge/commit/acd16196158f9a393187551b21a2fc61650f2e3d","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/IBM/mcp-context-forge/releases/tag/v0.3.1","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-13T15:48:19.690482Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-13T15:48:27.245Z","content_hash":"1047ffb70fdb6421964e3472259872fccd1463a07012a8cf89aea3ff5489c06d"}}