CVE Explorer
CVE-2025-66202
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
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"astro","vendor":"withastro","versions":[{"status":"affected","version":"< 5.15.8"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:ef3ca209eabef0e9993101ed83c0a8dbf8ffd33d432370f5e2145486417f2df7 · sha256:97c6dba5b19ad574… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"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"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:ef3ca209eabef0e9993101ed83c0a8dbf8ffd33d432370f5e2145486417f2df7 · sha256:97c6dba5b19ad574… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-647","description":"CWE-647: Use of Non-Canonical URL Paths for Authorization Decisions","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:ef3ca209eabef0e9993101ed83c0a8dbf8ffd33d432370f5e2145486417f2df7 · sha256:97c6dba5b19ad574… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/withastro/astro/commit/6f800813516b07bbe12c666a92937525fddb58ce","tags":["x_refsource_MISC"],"url":"https://github.com/withastro/astro/commit/6f800813516b07bbe12c666a92937525fddb58ce"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:ef3ca209eabef0e9993101ed83c0a8dbf8ffd33d432370f5e2145486417f2df7 · sha256:97c6dba5b19ad574… · /containers/cna/references/2
{"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"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:ef3ca209eabef0e9993101ed83c0a8dbf8ffd33d432370f5e2145486417f2df7 · sha256:97c6dba5b19ad574… · /containers/cna/references/1
{"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"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:ef3ca209eabef0e9993101ed83c0a8dbf8ffd33d432370f5e2145486417f2df7 · sha256:97c6dba5b19ad574… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.