Open Redirect in Onlook
CVE-2025-63784
An Open Redirect vulnerability exists in the OAuth callback handler in file onlook/apps/web/client/src/app/auth/callback/route.ts in Onlook web application 0.2.32. The vulnerability occurs because the application trusts the X-Forwarded-Host header value without proper validation when constructing a redirect URL. A remote attacker can send a manipulated X-Forwarded-Host header to redirect an authenticated user to an arbitrary external website under their control, which can be exploited for phishing attacks.
Vulnerability class: Open Redirect
EPSS: 0.004 (33.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Onlook — versions 0.2.32
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Broken Link)
- cve@mitre.org (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-63784?
- CVE-2025-63784 is a medium-severity vulnerability in Onlook, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.5/10. Published 2025-11-07.
- How severe is CVE-2025-63784?
- Medium severity. CVSS v3 base score is 6.5 out of 10.