Path Traversal Vulnerability in Home Assistant Community Store by Home Assistant
CVE-2021-47942

8.7HIGH

Key Information:

Vendor

Home-assistant

Status
Home Assistant Community Store (hacs)
Vendor
CVE Published:
16 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47942?

A path traversal vulnerability exists in Home Assistant Community Store (HACS) 1.10.0 that enables unauthenticated attackers to exploit the /hacsfiles/ endpoint. This flaw allows attackers to traverse directories and read sensitive files, such as the .storage/auth file, which contains user credentials and refresh tokens. By obtaining this sensitive information, attackers can craft valid JWT tokens to gain unauthorized administrative access to Home Assistant instances, posing a significant risk to users' data and system integrity.

Affected Version(s)

Home Assistant Community Store (HACS) 0 < 1.10.0

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-2021-47942 - Proof of Concept

References

https://www.exploit-db.com/exploits/49495
exploit
https://www.home-assistant.io/
product
https://github.com/hacs/integration
product

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
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

Lyghtnox
.