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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 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)
EPSS
39.2%
KEV
Not listed

Published

May 16, 2026

Last Modified

May 27, 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 11× in last 7d / 67× 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 196 total refreshes for this CVE.

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

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 May 27, 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 39.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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