Is this vulnerability remotely exploitable?

Yes, it can be exploited remotely through the Hestia Control Panel API, but only by clients that can successfully authenticate and reach the index.php endpoint.

What level of access does an attacker need?

The attacker needs valid authenticated access to the control panel or its API with permissions sufficient to invoke the v-make-tmp-file command or equivalent file-writing functionality.

What is the safest general fix pattern?

The most robust fix is to confine all file creation to a tightly controlled directory, enforce strict validation on file paths, and ensure that API commands cannot specify arbitrary locations on the filesystem.

Severity:

HIGH RISK

(8.8)

Arbitrary File Write (CWE-73) via API Endpoint in Hestia Control Panel

CVE-2021-47871

Published:

Jan 21, 2026

Status:

Awaiting Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-306

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

Account Takeover / Loss of Account Control

February 17, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Remote Code Execution on the Server Host

February 17, 2026

Vulnerability Type

Category:

Arbitrary File Write / External Control of File Name or Path

CWE:

CWE-73

Impact:

Privilege Escalation and Remote System Compromise

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Arbitrary File Write / External Control of File Name or Path

CWE:

CWE-73

Impact:

Privilege Escalation and Remote System Compromise

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Arbitrary File Write (CWE-73) via API Endpoint in Hestia Control Panel

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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