{"cve":"CVE-2025-71403","nvd":{"published":"2026-08-01T13:16:56.607","modified":"2026-10-06T22:10:00.247","status":"Deferred","description":"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 trigger open redirects to steal sensitive tokens for account takeover.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","score":7.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","score":7.1},"cwes":["CWE-601"],"references":["https://github.com/better-auth/better-auth/security/advisories/GHSA-vp58-j275-797x","https://www.vulncheck.com/advisories/better-auth-before-open-redirect-via-trustedorigins-bypass"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2025-71403","score":0.00342,"percentile":0.27431,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-vp58-j275-797x","url":"https://osv.dev/vulnerability/GHSA-vp58-j275-797x","summary":"Better Auth allows bypassing the trustedOrigins Protection which leads to ATO","modified":"2026-08-02T03:56:47.282836883Z","packages":[{"ecosystem":"npm","name":"better-auth","purl":"pkg:npm/better-auth","ranges":["<1.1.21"],"fixed":["1.1.21"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}