Arbitrary File Write Vulnerability in Hestia Control Panel by Hestia
CVE-2021-47871

8.6HIGH

Key Information:

Vendor

Hestia Control Panel

Status
Hestia Control Panel
Vendor
CVE Published:
21 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47871?

The Hestia Control Panel version 1.3.2 is susceptible to an arbitrary file write vulnerability that can be exploited by authenticated attackers. This security flaw allows attackers to leverage the API index.php endpoint via the v-make-tmp-file command to write files to arbitrary locations on the server. Such exploitation can potentially allow the writing of sensitive SSH keys or other files, creating serious security risks for the affected systems.

Affected Version(s)

Hestia Control Panel 1.3.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47871 - Proof of Concept

References

https://www.exploit-db.com/exploits/49667
exploit
https://hestiacp.com/
product
https://github.com/hestiacp/hestiacp
product

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Numan Türle
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