CVE-2021-47942
Home Assistant Community Store 1.10.0 Path Traversal Account Takeover
Description
Home Assistant Community Store (HACS) prior to 1.10.0 contains a path traversal vulnerability that allows unauthenticated attackers to read sensitive files by traversing directories via the /hacsfiles/ endpoint. Attackers can retrieve the .storage/auth file containing user credentials and refresh tokens, then craft valid JWT tokens to gain administrative access to Home Assistant instances.
INFO
Published Date :
May 16, 2026, 4:16 p.m.
Last Modified :
May 27, 2026, 8:42 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Home Assistant Community Store (HACS) to the latest version.
- Review and apply any relevant security patches for HACS.
- Rotate user credentials and refresh tokens immediately.
- Monitor system for unauthorized access attempts.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47942.
| URL | Resource |
|---|---|
| https://github.com/hacs/integration | Product |
| https://www.exploit-db.com/exploits/49495 | Exploit |
| https://www.home-assistant.io/ | Product |
| https://www.vulncheck.com/advisories/home-assistant-community-store-path-traversal-account-takeover | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47942 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47942
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47942 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47942 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 27, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:hacs:home_assistant_community_store:*:*:*:*:*:*:*:* versions up to (excluding) 1.10.0 Added Reference Type VulnCheck: https://github.com/hacs/integration Types: Product Added Reference Type VulnCheck: https://www.exploit-db.com/exploits/49495 Types: Exploit Added Reference Type VulnCheck: https://www.home-assistant.io/ Types: Product Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/home-assistant-community-store-path-traversal-account-takeover Types: Third Party Advisory -
CVE Modified by [email protected]
May. 26, 2026
Action Type Old Value New Value Changed Description Home Assistant Community Store (HACS) 1.10.0 contains a path traversal vulnerability that allows unauthenticated attackers to read sensitive files by traversing directories via the /hacsfiles/ endpoint. Attackers can retrieve the .storage/auth file containing user credentials and refresh tokens, then craft valid JWT tokens to gain administrative access to Home Assistant instances. Home Assistant Community Store (HACS) prior to 1.10.0 contains a path traversal vulnerability that allows unauthenticated attackers to read sensitive files by traversing directories via the /hacsfiles/ endpoint. Attackers can retrieve the .storage/auth file containing user credentials and refresh tokens, then craft valid JWT tokens to gain administrative access to Home Assistant instances. -
New CVE Received by [email protected]
May. 16, 2026
Action Type Old Value New Value Added Description Home Assistant Community Store (HACS) 1.10.0 contains a path traversal vulnerability that allows unauthenticated attackers to read sensitive files by traversing directories via the /hacsfiles/ endpoint. Attackers can retrieve the .storage/auth file containing user credentials and refresh tokens, then craft valid JWT tokens to gain administrative access to Home Assistant instances. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-22 Added Reference https://github.com/hacs/integration Added Reference https://www.exploit-db.com/exploits/49495 Added Reference https://www.home-assistant.io/ Added Reference https://www.vulncheck.com/advisories/home-assistant-community-store-path-traversal-account-takeover