CVE-2021-43786

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 35% 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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0

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

Nodebb is an open source Node.js based forum software. In affected versions incorrect logic present in the token verification step unintentionally allowed master token access to the API. The vulnerability has been patch as of v1.18.5. Users are advised to upgrade as soon as possible.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
81.2%
KEV
Not listed

Published

November 29, 2021

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated Jun 20, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

API token verification can be bypassed · Advisory · NodeBB/NodeBB · GitHub

https://github.com/NodeBB/NodeBB/security/advisories/GHSA-hf2m-j98r-4fqw
github_release Patch Available

v1.18.5

Patch available: NodeBB/NodeBB v1.18.5

https://github.com/NodeBB/NodeBB/releases/tag/v1.18.5
github_commit Patch Available

commit 04dab1d550cd (NodeBB/NodeBB)

Patch available: NodeBB/NodeBB v4.4.5 (contains commit 04dab1d550cd)

https://github.com/NodeBB/NodeBB/commit/04dab1d550cdebf4c1567bca9a51f8b9ca48a500
generic

NodeBB 1.18.4 - Remote Code Execution With One Shot | Sonar

https://blog.sonarsource.com/nodebb-remote-code-execution-with-one-shot/

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
nodebb—1.18.5—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 49× 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.

  1. 2026-07-13 22:27 UTCEPSS rescore
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  19. 2026-07-02 16:57 UTCEPSS rescore
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  21. 2026-06-30 23:20 UTCEPSS rescore
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  23. 2026-06-30 05:00 UTCOSV refresh
  24. 2026-06-29 14:04 UTCEPSS rescore
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  1. 2026-06-28 04:54 UTCEPSS rescore
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  5. 2026-06-25 13:48 UTCEPSS rescore
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  9. 2026-06-23 21:31 UTCEPSS rescore
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  11. 2026-06-21 01:58 UTCEPSS rescore
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  22. 2026-06-15 17:46 UTCEPSS rescore
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  25. 2026-06-13 22:58 UTCEPSS rescore
  26. 2026-06-13 22:58 UTCEPSS rescore
  27. 2026-06-12 23:10 UTCEPSS rescore
  28. 2026-06-12 16:10 UTCOSV refresh
  29. 2026-06-11 13:58 UTCEPSS rescore
  30. 2026-06-11 13:58 UTCEPSS rescore
  31. 2026-06-10 22:16 UTCEPSS rescore
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  36. 2026-06-07 15:23 UTCEPSS rescore
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  38. 2026-06-06 13:46 UTCEPSS rescore
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  40. 2026-06-05 22:45 UTCEPSS rescore
  41. 2026-06-05 06:09 UTCEPSS rescore
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  43. 2026-06-04 13:10 UTCEPSS rescore
  44. 2026-06-04 13:10 UTCEPSS rescore
  45. 2026-06-02 20:11 UTCEPSS rescore
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  47. 2026-06-01 13:50 UTCEPSS rescore
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  49. 2026-05-31 22:29 UTCEPSS rescore
  50. 2026-05-31 22:29 UTCEPSS rescore
  51. 2026-05-31 00:15 UTCEPSS rescore
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  53. 2026-05-29 13:42 UTCEPSS rescore
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  56. 2026-05-27 13:39 UTCEPSS rescore
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  58. 2026-05-26 13:42 UTCEPSS rescore
  59. 2026-05-26 13:42 UTCEPSS rescore
  60. 2026-05-26 07:04 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-43786?
CVE-2021-43786 is a critical vulnerability published on November 29, 2021. Nodebb is an open source Node.js based forum software. In affected versions incorrect logic present in the token verification step unintentionally allowed master token access to the API. The vulnerability has been patch as of v1.18.5. Users are advised to upgrade as soon as possible.
When was CVE-2021-43786 disclosed?
CVE-2021-43786 was first published in the National Vulnerability Database on November 29, 2021, 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-2021-43786 actively exploited?
CVE-2021-43786 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 81.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-43786?
CVE-2021-43786 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-43786?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-43786, 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.

Dependency Blast Radius

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