{"id":72560,"date":"2025-10-29T01:45:36","date_gmt":"2025-10-28T22:15:36","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2025-62800-fastmcp-vulnerable-to-reflected-xss-in-clients-callback-page\/"},"modified":"2025-10-29T01:45:36","modified_gmt":"2025-10-28T22:15:36","slug":"cve-2025-62800-fastmcp-vulnerable-to-reflected-xss-in-clients-callback-page","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2025-62800-fastmcp-vulnerable-to-reflected-xss-in-clients-callback-page\/","title":{"rendered":"CVE-2025-62800 &#8211; FastMCP vulnerable to reflected XSS in client&#8217;s callback page"},"content":{"rendered":"<p>CVE ID : CVE-2025-62800<\/p>\n<p>Published :  Oct. 28, 2025, 10:15 p.m. | 29\u00a0minutes ago<\/p>\n<p>Description : FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0 have a reflected cross-site scripting vulnerability in the OAuth client callback page (oauth_callback.py) where unescaped user-controlled values are inserted into the generated HTML, allowing arbitrary JavaScript execution in the callback server origin. The issue is fixed in version 2.13.0.<\/p>\n<p>Severity: 5.3 | MEDIUM<\/p>\n<p>Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID : CVE-2025-62800 Published : Oct. 28, 2025, 10:15 p.m. | 29\u00a0minutes ago Description : FastMCP is the standard framework for building MCP applications. Versions prior to 2.13.0 have a reflected cross-site scripting vulnerability in the OAuth client callback page (oauth_callback.py) where unescaped user-controlled values are inserted into the generated HTML, allowing arbitrary JavaScript &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-72560","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/72560","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=72560"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/72560\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=72560"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=72560"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=72560"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}