CVE-2026-37504

import requests def check_vulnerability(target_url): """ PoC for CVE-2026-37504 Demonstrates the insecure transmission of the token via GET parameter. """ # Example vulnerable endpoint endpoint = "/api/v1/server/UniProxy/user" # Simulated token (in real scenario, this is the secret) token = "SECRET_SERVER_TOKEN_123" # Construct the vulnerable URL full_url = f"{target_url}{endpoint}?token={token}" print(f"[+] Sending request to vulnerable endpoint: {full_url}") print("[!] WARNING: The token is now visible in logs, history, and Referer headers.") try: response = requests.get(full_url) print(f"[+] Response Status: {response.status_code}") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": target = "http://v2board-example.com" check_vulnerability(target)

{"cve": {"id": "CVE-2026-37504", "sourceIdentifier": "[email protected]", "published": "2026-05-01T16:16:30.633", "lastModified": "2026-05-11T19:25:20.300", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Sensitive server_token exposed via GET parameter in V2Board thru 1.7.4. In app/Http/Controllers/Server/UniProxyController.php, the server authentication token is accepted via GET parameter transmission. The token appears in URLs such as /api/v1/server/UniProxy/user?token=SECRET, causing it to be recorded in web server access logs, browser history, HTTP Referer headers, and proxy/CDN logs. An attacker who gains access to any log source can extract the token and impersonate a proxy server node, potentially intercepting all user traffic."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 3.6}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-598"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:v2board:v2board:*:*:*:*:*:*:*:*", "versionEndIncluding": "1.7.4", "matchCriteriaId": "5514969D-29B0-4D10-A1F8-11154F0BCAF6"}]}]}], "references": [{"url": "https://gist.github.com/sgInnora/1330e1a82caa79906eec55eeff2c99b9", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://github.com/v2board/v2board", "source": "[email protected]", "tags": ["Product"]}]}}