XSS via prototype pollution in NodeBB
Impact
A prototype pollution vulnerability in the uploader module allowed a malicious user to inject arbitrary data (i.e. javascript) into the DOM, theoretically allowing for an account takeover when used in conjunction with a path traversal vulnerability disclosed at the same time as this report.
Patches
The vulnerability has been patched as of v1.18.5.
Workarounds
Cherry-pick commit hash 1783f918bc19568f421473824461ff2ed7755e4c 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 security@nodebb.org
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | nodebb | >= 1.15.0, < 1.18.5 | 1.18.5 |
References
- https://github.com/NodeBB/NodeBB/security/advisories/GHSA-wx69-rvg3-x7fc
- https://nvd.nist.gov/vuln/detail/CVE-2021-43787
- https://github.com/NodeBB/NodeBB/commit/1783f918bc19568f421473824461ff2ed7755e4c
- https://blog.sonarsource.com/nodebb-remote-code-execution-with-one-shot
- https://github.com/NodeBB/NodeBB
- https://github.com/NodeBB/NodeBB/releases/tag/v1.18.5
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H- Weakness (CWE)
CWE-79- Platform
- npm
- Package
nodebb- Disclosed
- 30.11.2021
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-wx69-rvg3-x7fc - CC BY 4.0
Vulnerability history: nodebb
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 14
- First → latest
- 05.2019 08.2025
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 5
- High 2
- Medium 7
Disclosures per year
- 2019: 1
- 2020: 0
- 2021: 3
- 2022: 5
- 2023: 2
- 2024: 1
- 2025: 2
- 2026: 0
-
XSS via prototype pollution in NodeBB this entry
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