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CVE-2021-47942

Hacs Home Assistant Community Store path traversal

7.5 HIGHPublic exploitEPSS 0.50%
  1. Published16 May 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Hacs Home Assistant Community Store< 1.10.0

Remediation

Fixed in
Hacs Home Assistant Community Store≥ 1.10.0

References

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Frequently asked

Is CVE-2021-47942 being actively exploited?

CVE-2021-47942 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.50%.

How severe is CVE-2021-47942?

CVE-2021-47942 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.50% probability of exploitation.

Which products are affected by CVE-2021-47942?

Affected products include Hacs Home Assistant Community Store.

How do I fix CVE-2021-47942?

Upgrade affected software to a fixed version, for example Hacs Home Assistant Community Store 1.10.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.