CVE-2023-37266

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 6.8% (93rd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 6.8%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

CasaOS is an open-source Personal Cloud system. Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as root on CasaOS instances. This problem was addressed by improving the validation of JWTs in commit 705bf1f. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100CISA SSVC

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
6.8%
EPSS %ILE
93rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 17, 2023

Last Modified

April 10, 2025

Advisory Details (3)

Auto-updated Oct 10, 2026
Patch available. Sources: github_commit, github.
githubMentions a patch (unverified)

Weak JWT secrets · Advisory · IceWhaleTech/CasaOS · GitHub

https://github.com/IceWhaleTech/CasaOS/security/advisories/GHSA-m5q5-8mfw-p2hr
github_commit

commit 705bf1facbff (IceWhaleTech/CasaOS)

Fix landed in IceWhaleTech/CasaOS commit 705bf1facbff — awaiting tagged release

https://github.com/IceWhaleTech/CasaOS/commit/705bf1facbffd2ca40b159b0303132b6fdf657ad
generic

Security Vulnerabilities in CasaOS | Sonar

https://www.sonarsource.com/blog/security-vulnerabilities-in-casaos

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/IceWhaleTech/CasaOS—
  • every version up to 0.4.4: fixed in 0.4.4
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 24× 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 153 total refreshes for this CVE.

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

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2023/CVE-2023-37266.yaml
    Published Jul 27, 2023

    CasaOS < 0.4.4 - Authentication Bypass via Random JWT Token

    Open source ↗

Related CVEs(same product + same CWE)

Same product

2 shown

Go:github.com/IceWhaleTech/CasaOS

Frequently asked(5)

What is CVE-2023-37266?
CVE-2023-37266 is a critical vulnerability published on July 17, 2023. CasaOS is an open-source Personal Cloud system. Unauthenticated attackers can craft arbitrary JWTs and access features that usually require authentication and execute arbitrary commands as root on CasaOS instances. This problem was addressed by improving the validation of JWTs in commit 705bf1f.…
When was CVE-2023-37266 disclosed?
CVE-2023-37266 was first published on July 17, 2023, with the most recent update on April 10, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-37266 actively exploited?
CVE-2023-37266 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.8% probability of exploitation in the next 30 days (93rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-37266?
CVE-2023-37266 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-37266?
A fix for CVE-2023-37266 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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