Description

auth-js is an isomorphic Javascript library for Supabase Auth. Prior to version 2.69.1, the library functions getUserById, deleteUser, updateUserById, listFactors and deleteFactor did not require the user supplied values to be valid UUIDs. This could lead to a URL path traversal, resulting in the wrong API function being called. Implementations that follow security best practice and validate user controlled inputs, such as the userId are not affected by this. This issue has been patched in version 2.69.1.

Classification

CVE ID: CVE-2025-48370

CVSS Base Severity: LOW

CVSS Base Score: 2.7

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

Affected Products

Vendor: supabase

Product: auth-js

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.11% (probability of being exploited)

EPSS Percentile: 30.12% (scored less or equal to compared to others)

EPSS Date: 2025-06-06 (when was this score calculated)

Stakeholder-Specific Vulnerability Categorization (SSVC)

SSVC Exploitation: none

SSVC Technical Impact: partial

SSVC Automatable: true

References

https://nvd.nist.gov/vuln/detail/CVE-2025-48370
https://github.com/supabase/auth-js/security/advisories/GHSA-8r88-6cj9-9fh5
https://github.com/supabase/auth-js/pull/1063

Timeline