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MEDIUM severity

NodeBB vulnerable to path traversal in translator moduleGHSA-pfj7-2qfw-vwgm

MEDIUMFix: NodeBB/NodeBB@c8b2fc4

GHSA-pfj7-2qfw-vwgm is a medium-severity (CVSS 5) Path Traversal vulnerability in nodebb. 1 public exploit reference exists, so weaponization risk is real. A fix is available for nodebb — see the affected versions and patch details below.

Also known asCVE-2021-43788
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
25.8%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs98th percentile — riskier than 98% of all scored CVEsHighest risk
0.00%10.9%21.9%32.8%2.5%25.8%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-pfj7-2qfw-vwgm by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the 10–50% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

0other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
nodebbnpm
274downloads / week

Description

Impact

Prior to v1.18.5, a path traversal vulnerability was present that allowed users to access JSON files outside of the expected languages/ directory.

Patches

The vulnerability has been patched as of v1.18.5.

Workarounds

Cherry-pick commit hash c8b2fc46dc698db687379106b3f01c71b80f495f to receive this patch in lieu of a full upgrade.

For more information

If you have any questions or comments about this advisory:

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmnodebb≥ 1.0.4&&< 1.18.51.18.5npm install nodebb@1.18.5

Affected Products

1 product · 1 configurations
Application
nodebbnodebb
≥ 1.0.4 && ≤ 1.18.4
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nodebb, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update nodebb to 1.18.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-pfj7-2qfw-vwgm is resolved across your whole dependency graph.

  3. Workarounds

    Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

### Impact Prior to v1.18.5, a path traversal vulnerability was present that allowed users to access JSON files outside of the expected `languages/` directory. ### Patches The vulnerability has been patched as of v1.18.5. ### Workarounds Cherry-pick commit hash `c8b2fc46dc698db687379106b3f01c71b80f495f` to receive this patch in lieu of a full upgrade. ### For more information If you have any questions or comments about this advisory: * Email us at [[email protected]](mailto:[email protected])
O3 Security · Impact-Aware SCA

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NodeBB vulnerable to path traversal in translator module