CVE-2025-71403
better-auth before 1.1.20 Open Redirect via trustedOrigins Bypass
CVSS Score
7.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-601 |
| Vendor | better-auth |
| Product | better-auth |
| Published | Aug 1, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None
Affected Versions
better-auth / better-auth
0 < 1.1.20
References
Credits
🔍 castilho101