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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (33.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Onlook — versions 0.2.32
Weakness classification (CWE)
References
- tossbank.notion.site/Open-Redirect-in-onlook-27e557175d2e80ac8641fab59dc36021 (Broken Link)
- blog.soohyun.tech/CVE-2025-63784-Open-Redirect-in-Onlook-27e557175d2e80ac8641fa… (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.