CVE-2021-47942

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-16. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
41%
KEV
Not listed

Published

May 16, 2026

Last Modified

August 14, 2026

Advisory Details (4)

Auto-updated May 16, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Home Assistant Community Store 1.10.0 Path Traversal Account Takeover | Advisories | VulnCheck

https://www.vulncheck.com/advisories/home-assistant-community-store-path-traversal-account-takeover
generic

Home Assistant

https://www.home-assistant.io/
generic🟡 PoC Available

Home Assistant Community Store (HACS) 1.10.0 - Directory Traversal - Python webapps Exploit

https://www.exploit-db.com/exploits/49495
generic

GitHub - hacs/integration: HACS gives you a powerful UI to handle downloads of all your custom needs. · GitHub

https://github.com/hacs/integration

Vendor Advisories for CVE-2021-47942(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 58× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 254 total refreshes for this CVE.

  1. 2026-09-04 13:57 UTCEPSS rescore
  2. 2026-09-04 05:03 UTCEPSS rescore
  3. 2026-09-02 14:09 UTCEPSS rescore
  4. 2026-09-01 13:51 UTCEPSS rescore
  5. 2026-08-30 19:14 UTCEPSS rescore
  6. 2026-08-30 01:19 UTCEPSS rescore
  7. 2026-08-28 21:38 UTCEPSS rescore
  8. 2026-08-27 14:22 UTCEPSS rescore
  9. 2026-08-26 14:43 UTCEPSS rescore
  10. 2026-08-25 13:46 UTCEPSS rescore
  11. 2026-08-24 14:13 UTCEPSS rescore
  12. 2026-08-23 17:24 UTCEG score recompute
  13. 2026-08-23 17:24 UTCGHSA enrichment
  14. 2026-08-22 00:53 UTCEG score recompute
  15. 2026-08-22 00:53 UTCGHSA enrichment
  16. 2026-08-21 23:46 UTCEPSS rescore
  17. 2026-08-20 22:52 UTCEPSS rescore
  18. 2026-08-20 19:14 UTCEG score recompute
  19. 2026-08-20 19:14 UTCGHSA enrichment
  20. 2026-08-19 17:01 UTCEPSS rescore
  21. 2026-08-18 13:45 UTCEPSS rescore
  22. 2026-08-17 13:44 UTCEPSS rescore
  23. 2026-08-17 10:11 UTCEG score recompute
  24. 2026-08-17 10:11 UTCGHSA enrichment
  25. 2026-08-16 14:53 UTCEPSS rescore
Show 75 more
  1. 2026-08-16 03:43 UTCEG score recompute
  2. 2026-08-16 03:43 UTCGHSA enrichment
  3. 2026-08-16 02:11 UTCEPSS rescore
  4. 2026-08-15 01:27 UTCEPSS rescore
  5. 2026-08-14 17:21 UTCGHSA enrichment
  6. 2026-08-14 14:55 UTCGHSA enrichment
  7. 2026-08-14 02:16 UTCEG score recompute
  8. 2026-08-14 02:16 UTCGHSA enrichment
  9. 2026-08-13 21:57 UTCEPSS rescore
  10. 2026-08-13 03:22 UTCGHSA enrichment
  11. 2026-08-12 14:43 UTCEG score recompute
  12. 2026-08-12 14:43 UTCGHSA enrichment
  13. 2026-08-12 13:48 UTCEPSS rescore
  14. 2026-08-11 13:59 UTCEG score recompute
  15. 2026-08-11 13:59 UTCGHSA enrichment
  16. 2026-08-11 13:38 UTCEPSS rescore
  17. 2026-08-11 00:45 UTCEG score recompute
  18. 2026-08-11 00:45 UTCGHSA enrichment
  19. 2026-08-10 03:01 UTCGHSA enrichment
  20. 2026-08-09 14:22 UTCEG score recompute
  21. 2026-08-09 14:22 UTCGHSA enrichment
  22. 2026-08-09 13:44 UTCEPSS rescore
  23. 2026-08-09 01:43 UTCEG score recompute
  24. 2026-08-09 01:43 UTCGHSA enrichment
  25. 2026-08-08 16:34 UTCEPSS rescore
  26. 2026-08-08 02:34 UTCEG score recompute
  27. 2026-08-08 02:34 UTCGHSA enrichment
  28. 2026-08-07 16:24 UTCEPSS rescore
  29. 2026-08-07 13:55 UTCGHSA enrichment
  30. 2026-08-07 01:16 UTCEG score recompute
  31. 2026-08-07 01:16 UTCGHSA enrichment
  32. 2026-08-06 13:44 UTCEPSS rescore
  33. 2026-08-06 10:07 UTCGHSA enrichment
  34. 2026-08-05 21:28 UTCEG score recompute
  35. 2026-08-05 21:28 UTCGHSA enrichment
  36. 2026-08-05 19:15 UTCEPSS rescore
  37. 2026-08-04 15:06 UTCEPSS rescore
  38. 2026-08-04 10:34 UTCEPSS rescore
  39. 2026-08-03 18:53 UTCEG score recompute
  40. 2026-08-03 18:53 UTCGHSA enrichment
  41. 2026-08-03 10:33 UTCEPSS rescore
  42. 2026-08-02 20:04 UTCGHSA enrichment
  43. 2026-08-02 07:25 UTCEG score recompute
  44. 2026-08-02 07:25 UTCGHSA enrichment
  45. 2026-08-02 02:24 UTCEPSS rescore
  46. 2026-08-01 18:45 UTCEG score recompute
  47. 2026-08-01 18:45 UTCGHSA enrichment
  48. 2026-08-01 04:13 UTCEPSS rescore
  49. 2026-07-30 16:25 UTCEPSS rescore
  50. 2026-07-30 01:28 UTCEPSS rescore
  51. 2026-07-28 15:33 UTCEPSS rescore
  52. 2026-07-26 14:52 UTCEPSS rescore
  53. 2026-07-25 14:15 UTCEPSS rescore
  54. 2026-07-24 14:15 UTCEPSS rescore
  55. 2026-07-24 14:15 UTCEPSS rescore
  56. 2026-07-23 14:16 UTCEPSS rescore
  57. 2026-07-23 02:06 UTCEG score recompute
  58. 2026-07-22 22:53 UTCEG score recompute
  59. 2026-07-22 14:06 UTCEPSS rescore
  60. 2026-07-21 15:22 UTCEPSS rescore
  61. 2026-07-21 15:22 UTCEPSS rescore
  62. 2026-07-20 17:05 UTCEPSS rescore
  63. 2026-07-19 14:29 UTCEPSS rescore
  64. 2026-07-19 02:27 UTCEPSS rescore
  65. 2026-07-19 02:27 UTCEPSS rescore
  66. 2026-07-18 10:02 UTCEPSS rescore
  67. 2026-07-18 00:29 UTCOSV refresh
  68. 2026-07-16 17:00 UTCEPSS rescore
  69. 2026-07-16 17:00 UTCEPSS rescore
  70. 2026-07-15 16:55 UTCEPSS rescore
  71. 2026-07-15 01:58 UTCEPSS rescore
  72. 2026-07-15 01:58 UTCEPSS rescore
  73. 2026-07-13 22:27 UTCEPSS rescore
  74. 2026-07-13 06:11 UTCEPSS rescore
  75. 2026-07-13 06:11 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-47942?
CVE-2021-47942 is a high vulnerability published on May 16, 2026. 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…
When was CVE-2021-47942 disclosed?
CVE-2021-47942 was first published in the National Vulnerability Database on May 16, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47942 actively exploited?
CVE-2021-47942 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 59.2% of all scored CVEs.
What is the CVSS score of CVE-2021-47942?
CVE-2021-47942 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2021-47942?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47942, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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