CVE-2023-40020

CRITICALNVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. 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
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.9Exploit: None knownExposed: 0

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

PrivateUploader is an open source image hosting server written in Vue and TypeScript. In affected versions app/routes/v3/admin.controller.ts did not correctly verify whether the user was an administrator (High Level) or moderator (Low Level) causing the request to continue processing. The response would be a 403 with ADMIN_ONLY, however, next() would call leading to any updates/changes in the route to process. This issue has been addressed in version 3.2.49. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS v3
9.9
EG Score
9.9(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

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
Severity99% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

August 14, 2023

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Sep 22, 2026
Patch available. Sources: github, github_commit.
github Patch Available

Improper Authentication in PrivateUploader · Advisory · Flowinity/Flowinity · GitHub

https://github.com/PrivateUploader/PrivateUploader/security/advisories/GHSA-vhrw-2472-rrjx
github_commit

commit 869657d61e3c (PrivateUploader/PrivateUploader)

Fix landed in PrivateUploader/PrivateUploader commit 869657d61e3c — awaiting tagged release

https://github.com/PrivateUploader/PrivateUploader/commit/869657d61e3c7a518177106fe63ea483082b0d3e

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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 181 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2023-40020?
CVE-2023-40020 is a critical vulnerability published on August 14, 2023. PrivateUploader is an open source image hosting server written in Vue and TypeScript. In affected versions app/routes/v3/admin.controller.ts did not correctly verify whether the user was an administrator (High Level) or moderator (Low Level) causing the request to continue processing. The response…
When was CVE-2023-40020 disclosed?
CVE-2023-40020 was first published in the National Vulnerability Database on August 14, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-40020 actively exploited?
CVE-2023-40020 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 60.8% of all scored CVEs.
What is the CVSS score of CVE-2023-40020?
CVE-2023-40020 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2023-40020?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-40020, 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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