Open redirect via trusted forwarded host header
Published Nov 7, 2025 · Updated Nov 7, 2025
Open redirect in Onlook web application 0.2.32 allows remote authenticated users to send users to attacker-controlled sites. The OAuth callback route reads X-Forwarded-Host and inserts it directly into the HTTPS redirect URL without validating the host. A successful OAuth code exchange and a deployment that accepts attacker-supplied proxy headers are required, enabling phishing through a trusted application flow.
Summary
What happened
Open redirect in Onlook web application 0.2.32 allows remote authenticated users to send users to attacker-controlled sites. The OAuth callback route reads X-Forwarded-Host and inserts it directly into the HTTPS redirect URL without validating the host. A successful OAuth code exchange and a deployment that accepts attacker-supplied proxy headers are required, enabling phishing through a trusted application flow.
The record
- CVE
- CVE-2025-63784
- Published
- Nov 7, 2025
- Updated
- Nov 7, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-601
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 7, 2025CVE publishedPublication date reported by the CVE source.
- Nov 7, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Open Redirect in Onlook proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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