---
id: CVE-2025-71404
title: >-
  better-auth versions after v0.0.2 and before 1.1.16 contain a reflected
  cross-site scripting (XSS) vulnerability on the /api/auth/error page, where
  the value of the 'error' URL parameter is reflected as HTML without proper
  neutralization…
summary: >-
  better-auth versions after v0.0.2 and before 1.1.16 contain a reflected
  cross-site scripting (XSS) vulnerability on the /api/auth/error page, where
  the value of the 'error' URL parameter is reflected as HTML without proper
  neutralization…
severity: none
cwe:
  - CWE-79
published: '2026-08-01'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:34:34.997'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-71404'
references:
  - url: >-
      https://github.com/better-auth/better-auth/commit/05ada0b79dbcac93cc04ceb79b23ca598d07830c
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/better-auth/better-auth/security/advisories/GHSA-9x4v-xfq5-m8x5
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/better-auth-before-reflected-xss-via-error-parameter
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00521
epssPercentile: 0.41689
ingestedAt: '2026-08-02T05:17:48.816Z'
---

## Overview

better-auth versions after v0.0.2 and before 1.1.16 contain a reflected cross-site scripting (XSS) vulnerability on the /api/auth/error page, where the value of the 'error' URL parameter is reflected as HTML without proper neutralization. An attacker who coerces a user into visiting a specially-crafted URL can execute arbitrary JavaScript in the context of the user's browser. The issue is fixed in version 1.1.16.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.