Ghostwire

CVE-2025-71403: better-auth versions before 1.1.20 contain a bypass vulnerability in trustedOrigins validation logic affecting absolute...

HIGH CVSS 7.1 Exploit Available

Published: August 1, 2026 | Last Modified: August 1, 2026

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.

Ghostwire Analysis — What This Means Practically

High CVSS score indicates significant risk — exploitation could lead to substantial data exposure or system compromise.
Exploit code is reported to be available, increasing the likelihood of active exploitation.

This analysis is generated by Ghostwire from NVD, CISA KEV, EPSS, and open-source intelligence data. Verify findings through primary sources before acting.

References

github.com/better-auth/better-auth/security/advisories/GHSA-vp58-j275-797x
www.vulncheck.com/advisories/better-auth-before-open-redirect-via-trustedorigins
www.tenable.com/cve/CVE-2025-71403
www.cnnvd.org.cn/home/globalSearch?keyword=CVE-2025-71403