Better Auth is an authentication and authorization library for TypeScript. Prior to version 1.1.21, the application is vulnerable to an open redirect due to improper validation of the callbackURL parameter in the email verification endpoint and any other endpoint that accepts callback url. While the server blocks fully qualified URLs, it incorrectly allows scheme-less URLs. This results in the browser interpreting the URL as a fully qualified URL, leading to unintended redirection. An attacker can exploit this flaw by crafting a malicious verification link and tricking users into clicking it. Upon successful email verification, the user will be automatically redirected to the attacker's website, which can be used for phishing, malware distribution, or stealing sensitive authentication tokens. This CVE is a bypass of the fix for GHSA-8jhw-6pjj-8723/CVE-2024-56734. Version 1.1.21 contains an updated patch.
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Affected Vendors & Products
References
History
Fri, 28 Feb 2025 16:30:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Better-auth
Better-auth better Auth |
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| CPEs | cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:node.js:*:* | |
| Vendors & Products |
Better-auth
Better-auth better Auth |
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| Metrics |
cvssV3_1
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Tue, 25 Feb 2025 15:15:00 +0000
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| Metrics |
ssvc
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Mon, 24 Feb 2025 22:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | Better Auth is an authentication and authorization library for TypeScript. Prior to version 1.1.21, the application is vulnerable to an open redirect due to improper validation of the callbackURL parameter in the email verification endpoint and any other endpoint that accepts callback url. While the server blocks fully qualified URLs, it incorrectly allows scheme-less URLs. This results in the browser interpreting the URL as a fully qualified URL, leading to unintended redirection. An attacker can exploit this flaw by crafting a malicious verification link and tricking users into clicking it. Upon successful email verification, the user will be automatically redirected to the attacker's website, which can be used for phishing, malware distribution, or stealing sensitive authentication tokens. This CVE is a bypass of the fix for GHSA-8jhw-6pjj-8723/CVE-2024-56734. Version 1.1.21 contains an updated patch. | |
| Title | Beter Auth has an Open Redirect via Scheme-Less Callback Parameter | |
| Weaknesses | CWE-601 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2025-02-24T22:16:55.224Z
Updated: 2025-02-25T14:29:03.293Z
Reserved: 2025-02-19T16:30:47.777Z
Link: CVE-2025-27143
Updated: 2025-02-25T14:28:59.455Z
Status : Analyzed
Published: 2025-02-24T23:15:11.160
Modified: 2025-02-28T16:07:41.847
Link: CVE-2025-27143
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