CVE-2021-43787
CRITICAL9.0EPSS 0.41%XSS via prototype pollution in NodeBB
Published: 11/30/2021Modified: 3/13/2026
Description
### 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 [[email protected]](mailto:[email protected])
Affected packages (1)
- npm/nodebb>= 1.15.0, < 1.18.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-43787
- PATCHhttps://github.com/NodeBB/NodeBB
- WEBhttps://blog.sonarsource.com/nodebb-remote-code-execution-with-one-shot
- WEBhttps://github.com/NodeBB/NodeBB/commit/1783f918bc19568f421473824461ff2ed7755e4c
- WEBhttps://github.com/NodeBB/NodeBB/releases/tag/v1.18.5
- WEBhttps://github.com/NodeBB/NodeBB/security/advisories/GHSA-wx69-rvg3-x7fc