{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-66202","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2025-11-24T23:01:29.677Z","datePublished":"2025-12-08T23:41:21.976Z","dateUpdated":"2025-12-09T16:04:07.923Z"},"containers":{"cna":{"title":"Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765","problemTypes":[{"descriptions":[{"cweId":"CWE-647","lang":"en","description":"CWE-647: Use of Non-Canonical URL Paths for Authorization Decisions","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/withastro/astro/security/advisories/GHSA-whqg-ppgf-wp8c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/withastro/astro/security/advisories/GHSA-whqg-ppgf-wp8c"},{"name":"https://github.com/withastro/astro/security/advisories/GHSA-ggxq-hp9w-j794","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/security/advisories/GHSA-ggxq-hp9w-j794"},{"name":"https://github.com/withastro/astro/commit/6f800813516b07bbe12c666a92937525fddb58ce","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/commit/6f800813516b07bbe12c666a92937525fddb58ce"}],"affected":[{"vendor":"withastro","product":"astro","versions":[{"version":"< 5.15.8","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2025-12-08T23:41:21.976Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-whqg-ppgf-wp8c","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-09T14:18:21.955591Z","id":"CVE-2025-66202","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-12-09T16:04:07.923Z"}}]}}