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CVE Vulnerability Details :
CVE-2025-71404
PUBLISHED
More InfoOfficial Page
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
View Known Exploited Vulnerability (KEV) details
Published At-01 Aug, 2026 | 12:22
Updated At-01 Aug, 2026 | 12:22
Rejected At-
▼CVE Numbering Authority (CNA)
better-auth before 1.1.16 Reflected XSS via error parameter

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.

Affected Products
Vendor
better-auth
Product
better-auth
Default Status
unaffected
Versions
Affected
  • From 0 before 1.1.16 (semver)
Unaffected
  • 1.1.16 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Type: CWE
CWE ID: CWE-79
Description: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Metrics
VersionBase scoreBase severityVector
4.05.1MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Version: 4.0
Base score: 5.1
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
reporter
Eriner
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/better-auth/better-auth/security/advisories/GHSA-9x4v-xfq5-m8x5
vendor-advisory
https://github.com/better-auth/better-auth/commit/05ada0b79dbcac93cc04ceb79b23ca598d07830c
patch
https://www.vulncheck.com/advisories/better-auth-before-reflected-xss-via-error-parameter
third-party-advisory
Hyperlink: https://github.com/better-auth/better-auth/security/advisories/GHSA-9x4v-xfq5-m8x5
Resource:
vendor-advisory
Hyperlink: https://github.com/better-auth/better-auth/commit/05ada0b79dbcac93cc04ceb79b23ca598d07830c
Resource:
patch
Hyperlink: https://www.vulncheck.com/advisories/better-auth-before-reflected-xss-via-error-parameter
Resource:
third-party-advisory
Details not found