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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| better-auth | better-auth | < 1.1.20 | 1.1.20 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | better-auth | < 1.1.21 | 1.1.21 | GHSA-vp58-j275-797x |
References
- GitHub Security Advisory (GHSA-vp58-j275-797x) vendor-advisory
- VulnCheck Advisory: better-auth before 1.1.20 Open Redirect via trustedOrigins Bypass third-party-advisory