{"id":"CVE-2025-66202","revision":"383609df05f347cfb56e97ccab0d92f1","records":[{"revision":"383609df05f347cfb56e97ccab0d92f1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-66202","aliases":[],"title":"Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765","description":"Astro is a web framework. Versions 5.15.7 and below have a double URL encoding bypass which allows any unauthenticated attacker to bypass path-based authentication checks in Astro middleware, granting unauthorized access to protected routes. While the original CVE-2025-64765 was fixed in v5.15.8, the fix is insufficient as it only decodes once. By using double-encoded URLs, attackers can still bypass authentication and access any route protected by middleware pathname checks. This issue is fixed in version 5.15.8.","state":0,"publishedAt":"2025-12-08T23:41:21.976+00:00","modifiedAt":"2025-12-09T16:04:07.923+00:00","affected":[{"ecosystem":"Vendor product","name":"astro","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"withastro\",\n                    \"product\": \"astro\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 5.15.8\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/withastro/astro/security/advisories/GHSA-whqg-ppgf-wp8c","https://github.com/withastro/astro/security/advisories/GHSA-ggxq-hp9w-j794","https://github.com/withastro/astro/commit/6f800813516b07bbe12c666a92937525fddb58ce"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-66202","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-66202","identifiers":["CVE-2025-66202"]},"retained":false,"historicalAffected":[]}],"coverage":[]}