{"id":"CVE-2025-71403","title":"better-auth versions before 1.1.20 contain a bypass vulnerability in trustedOrigins validation logic affecting absolute URLs and wildcard domains","summary":"better-auth versions before 1.1.20 contain a bypass vulnerability in trustedOrigins validation logic affecting absolute URLs and wildcard domains. Attackers can construct malicious callbackURL parameters that pass origin checks and trigg…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","cwe":["CWE-601"],"published":"2026-08-01","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:34:34.997","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-71403","references":[{"url":"https://github.com/better-auth/better-auth/security/advisories/GHSA-vp58-j275-797x","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/better-auth-before-open-redirect-via-trustedorigins-bypass","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00238,"epssPercentile":0.15133,"ingestedAt":"2026-08-02T05:17:48.788Z","slug":"CVE-2025-71403","body":"## Overview\n\nbetter-auth versions before 1.1.20 contain a bypass vulnerability in trustedOrigins validation logic affecting absolute URLs and wildcard domains. Attackers can construct malicious callbackURL parameters that pass origin checks and trigger open redirects to steal sensitive tokens for account takeover.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}