Nodebb is an open source Node.js based forum software. Prior to v1.18.5, a path traversal vulnerability was present that allowed users to access JSON files outside of the expected languages/ directory. The vulnerability has been patched as of v1.18.5. Users are advised to upgrade as soon as possible.
CVE-2021-43788
This medium-severity CVE scores 5.0 under NVD CVSS v3. EPSS exploit probability: 2.5%, top 14% 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).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.0
- EG Score
- 5.0(medium)
- EPSS
- 97.7%
- KEV
- Not listed
Published
November 29, 2021
Last Modified
November 21, 2024
References (8)
- security-advisories@githubhttps://blog.sonarsource.com/nodebb-remote-code-execution-with-one-shot/
- security-advisories@githubhttps://github.com/NodeBB/NodeBB/commit/c8b2fc46dc698db687379106b3f01c71b80f495f
- security-advisories@githubhttps://github.com/NodeBB/NodeBB/releases/tag/v1.18.5
- security-advisories@githubhttps://github.com/NodeBB/NodeBB/security/advisories/GHSA-pfj7-2qfw-vwgm
- af854a3a-2127-422b-91ae-364da2661108https://blog.sonarsource.com/nodebb-remote-code-execution-with-one-shot/
- af854a3a-2127-422b-91ae-364da2661108https://github.com/NodeBB/NodeBB/commit/c8b2fc46dc698db687379106b3f01c71b80f495f
- af854a3a-2127-422b-91ae-364da2661108https://github.com/NodeBB/NodeBB/releases/tag/v1.18.5
- af854a3a-2127-422b-91ae-364da2661108https://github.com/NodeBB/NodeBB/security/advisories/GHSA-pfj7-2qfw-vwgm
Affected Packages
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| nodebb | — | 1.18.5 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 39× 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.
- 2026-07-15 01:58 UTCEPSS rescore
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- 2026-06-30 04:30 UTCOSV refresh
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- 2026-06-24 14:03 UTCEPSS rescore
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- 2026-06-12 16:10 UTCOSV refresh
- 2026-06-11 13:58 UTCEPSS rescore
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- 2026-05-27 13:39 UTCEPSS rescore
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- 2026-05-26 07:17 UTCEPSS rescore
- 2026-05-26 07:04 UTCEG score recompute
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Frequently asked(5)
What is CVE-2021-43788?
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