P4Verified

CVE-2025-71403: better-auth 0 to before 1.1.20

CVE-2025-71403. CVSS 3.1 base score 7.1 (HIGH, Vendor/CNA). EPSS 0.00342 (percentile 0.25406), scored 2026-10-05.

Affected technology

better-auth · 0 to before 1.1.20
better-auth

Description’s affected range: versions before 1.1.20

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · Passive user interaction

What an attacker can do

Attackers can construct malicious callbackURL parameters that pass origin checks and trigger open redirects to steal sensitive tokens for account takeover. Vendor/CNA’s CVSS 4.0 assessment (base score 7.1/10) rates confidentiality impact as low; integrity impact as high; availability impact as none.

Published 2026-10-07 02:35:18.602574+00:00

CWE: CWE-601
CCR priority: 28.5 /100 (P4)
CVSS 3.1: 7.1 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N · Vendor/CNA
EPSS: 0.00342 · percentile 0.25406 · 2026-10-05
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-07 02:34:12.333111+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-71403.html