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    CVE-2025-71404

    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.

    Published:Aug 1, 2026
    Last Modified:Aug 3, 2026
    EPS:Aug 1, 2026
    EPSS Score:0.00399
    CVSS Score:5.1

    Affected Products

    Vendor
    Better-auth
    Product
    Better-auth\/oauth-provider
    Vendor
    Better-auth
    Product
    Better Auth

    Exploits

    No exploit reference

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High