CVE-2025-71403: 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
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-71403
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-71403 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for better-auth
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCVE-2026-67337: better-auth versions before 1.4.9 contain a two-factor authentication bypass vulnerability whe…nvd · 2026-08-01
- highCVE-2026-67336: better-auth versions before 1.6.11 contain insecure cryptographic defaults in the oidcProvider…nvd · 2026-08-01
- mediumCVE-2026-67335: better-auth versions before 1.6.2 fail to validate the OAuth state parameter against the store…nvd · 2026-08-01
- lowCVE-2026-67334: better-auth versions before 1.6.11 fail to delete cached sessions when removing users via admi…nvd · 2026-08-01
- highCVE-2026-67333: better-auth before 1.6.13 (and pre-release builds 1.7.0-beta.0 through 1.7.0-beta.3) fail to v…nvd · 2026-08-01
- mediumCVE-2026-67332: @better-auth/oauth-provider before 1.7.0-beta.4 fails to bind access-token audience to the aut…nvd · 2026-08-01
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