CVE-2021-47942

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.

Overview

State

—

Assigner (CNA)

—

CVSS severity

high

CVSS score

7.5 / 10

CVSS vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Effective score

7.5 / 10 HIGH source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2021-47942

Linked Threat

CVE-2021-47942 — CVE-2021-47942

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published

2026-05-16 16:16:21 UTC

NVD last modified

2026-05-18 20:16:05 UTC

NVD CVSS v3.1

7.5 / 10 HIGH source: disclosure@vulncheck.com

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability subscore

3.9 / 10

Impact subscore

3.6 / 10

EPSS score

0.0017 (probability of exploitation in next 30 days)

EPSS percentile

37.87% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD-assigned CWE(s): CWE-22 (differs from the CNA list above)

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2021-34838

Assigner

VulnCheck

Published

May 16, 2026, 3:28:07 PM

Updated

May 25, 2026, 11:41:16 PM

EUVD base score (CVSS 4.0)

8.7 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EUVD-reported EPSS

0.1100

Vendors

home-assistant

Products

Home Assistant Community Store (HACS) (0 <1.10.0)

Aliases

GHSA-cqg8-v99m-gv9m

ENISA 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.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (7)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://github.com/hacs/integration tenable:github.com
• https://nvd.nist.gov/vuln/detail/CVE-2021-47942 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2021-47942 tenable:www.cve.org
• https://www.exploit-db.com/exploits/49495 tenable:www.exploit-db.com
• https://www.first.org/epss/ tenable:www.first.org
• https://www.home-assistant.io/ tenable:www.home-assistant.io
• https://www.vulncheck.com/advisories/home-assistant-community-store-path-traversal-account-takeover tenable:www.vulncheck.com

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Security Advisory Bulletin 064 | Ubiquiti Community
  web:community.ui.com

  Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...

  2026-05-26 02:55 UTC
• Coming from BlueBubbles - OpenClaw
  web:docs.openclaw.ai

  Migration checklist Use this checklist when you already know your old BlueBubbles config and want the shortest safe path: Verify imsg directly on the Mac that runs Messages.app (imsg chats, imsg history, imsg send, and imsg rpc --help). Copy behavior keys from channels.bluebubbles to channels.imessage: dmPolicy, allowFrom, groupPolicy, groupAllowFrom, groups, includeAttachments ...

  2026-05-26 02:55 UTC
• Careers - jobs.bmc.com
  web:jobs.bmc.com

  Careers - jobs.bmc.com ... Careers Careers

  2026-05-26 02:55 UTC
• Onlyfans
  web:obs-settings.onlyfans.com

  Onlyfans ... Onlyfans

  2026-05-26 02:55 UTC
• DOMO_BrandMovie_220318_fix (2) from Domo on Vimeo
  web:player.vimeo.com

  DOMO_BrandMovie_220318_fix (2) from Domo on Vimeo Play

  2026-05-26 02:55 UTC
• Google Translate
  web:translate.google.com

  Google's service, offered free of charge, instantly translates words, phrases, and web pages between English and over 100 other languages.

  2026-05-26 02:55 UTC
• WhatsApp
  web:wa.me

  Hosted by WhatsApp 2026 © WhatsApp LLC Privacy & Terms

  2026-05-26 02:55 UTC
• 7 Hidden Gemini Live AI Models Revealed Ahead Of Google I/O 2026 - Forbes
  web:www.forbes.com

  A teardown of Google App v17.18.22 reveals a hidden model selector for Gemini Live with seven AI models, including new "Thinking" and personalization models.

  2026-05-26 02:55 UTC
• Ultra Plus Best Performance and Visuals for Everyone
  web:www.nexusmods.com

  U+ for Star Wars Jedi: Survivor is a graphics enhancement and performance improvement mod that provides advanced control over lighting, reflections, and visual effects.

  2026-05-26 02:55 UTC
• VirusTotal - Home
  web:www.virustotal.com

  Streamline your investigations with Google Threat Intelligence Agentic and the new Dark Web (DDW) module. Perform hunting and pivoting across forums using natural language or specific modifiers. Bridge threat actor identities and map global operations easy.

  2026-05-26 02:55 UTC

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