CVE-2021-47942
CVE-2021-47942 is a high-severity vulnerability in Hacs Home Assistant Community Store with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v4: 8.7
- EPSS exploit prediction: 0% (39th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2021-34838
- Weakness: CWE-22
- Affected product: Hacs Home Assistant Community Store
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-47942?
- 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.
- How severe is CVE-2021-47942?
- CVE-2021-47942 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2021-47942 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-47942?
- CVE-2021-47942 affects Hacs Home Assistant Community Store. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-47942?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2021-47942 have an EU (EUVD) identifier?
- Yes. CVE-2021-47942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34838.
- When was CVE-2021-47942 published?
- CVE-2021-47942 was published on 2026-05-16 and last updated on 2026-06-17.
References
- https://github.com/hacs/integration
- https://www.exploit-db.com/exploits/49495
- https://www.home-assistant.io/
- https://www.vulncheck.com/advisories/home-assistant-community-store-path-traversal-account-takeover
Affected products (1)
- cpe:2.3:a:hacs:home_assistant_community_store:*:*:*:*:*:*:*:*
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