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CVE-2021-47871

8.8 · HIGH

Hestia Control Panel 1.3.2 contains an arbitrary file write vulnerability that allows authenticated attackers to write files to arbitrary locations using the API index.php endpoint.

Published Jan 21, 2026CWE-73EPSS 0.50%

Overview

CVE-2021-47871 is a high-severity vulnerability. It was published on January 21, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Hestia Control Panel 1.3.2 contains an arbitrary file write vulnerability that allows authenticated attackers to write files to arbitrary locations using the API index.php endpoint. Attackers can exploit the v-make-tmp-file command to write SSH keys or other content to specific file paths on the server.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/hestiacp/hestiacpRefhestiacp.com/Refwww.exploit-db.com/exploits/49667Refwww.vulncheck.com/advisories/hestia-control-panel-arbitrary-file-write

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47871?

CVE-2021-47871 is a high-severity vulnerability. It was published on January 21, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2021-47871?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47871?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47871?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47871 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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