{"id":"GHSA-frq9-3hp2-xvxg","summary":"Markdownify MCP Server allows Server-Side Request Forgery (SSRF) via the Markdownify.get() function","details":"All versions of the package mcp-markdownify-server are vulnerable to Server-Side Request Forgery (SSRF) via the Markdownify.get() function. An attacker can craft a prompt that, once accessed by the MCP host, can invoke the webpage-to-markdown, bing-search-to-markdown, and youtube-to-markdown tools to issue requests and read the responses to attacker-controlled URLs, potentially leaking sensitive information.","aliases":["CVE-2025-5276"],"modified":"2025-05-29T17:42:15.411630Z","published":"2025-05-29T06:31:17Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2025-05-29T17:27:26Z","nvd_published_at":"2025-05-29T05:15:21Z","cwe_ids":["CWE-918"]},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-5276"},{"type":"WEB","url":"https://github.com/zcaceres/markdownify-mcp/commit/0284aa8f34d32c65e20d8cda2d429b7943c9af03"},{"type":"PACKAGE","url":"https://github.com/zcaceres/markdownify-mcp"},{"type":"WEB","url":"https://github.com/zcaceres/markdownify-mcp/blob/224cf89f0d58616d2a5522f60f184e8391d1c9e3/src/server.ts#L20C17-L20C29"},{"type":"WEB","url":"https://security.snyk.io/vuln/SNYK-JS-MCPMARKDOWNIFYSERVER-10249387"}],"affected":[{"package":{"name":"mcp-markdownify-server","ecosystem":"npm","purl":"pkg:npm/mcp-markdownify-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.0.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/05/GHSA-frq9-3hp2-xvxg/GHSA-frq9-3hp2-xvxg.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:P"}]}