Information disclosure in Workos Authkit-React-Router
CVE-2025-55008
The AuthKit library for React Router 7+ provides helpers for authentication and session management using WorkOS & AuthKit with React Router. In versions 0.6.1 and below, @workos-inc/authkit-react-router exposed sensitive authentication artifacts — specifically sealedSession and accessToken by returning them from the authkitLoader. This caused them to be rendered into the browser HTML. This issue is fixed in version 0.7.0.
Vulnerability class: Information Disclosure
EPSS: 0.004 (29.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L.
Affected products
- Workos Authkit-react-router — versions < 0.7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-55008?
- CVE-2025-55008 is a high-severity vulnerability in Workos Authkit-React-Router, classified under Information Disclosure. CVSS score: 7.1/10. Published 2025-08-09.
- How severe is CVE-2025-55008?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2025-55008 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.