{"cve":"CVE-2021-43787","nvd":{"published":"2021-11-29T20:15:08.190","modified":"2026-06-17T04:11:26.350","status":"Modified","description":"Nodebb is an open source Node.js based forum software. In affected versions 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. The vulnerability has been patched as of v1.18.5. Users are advised to upgrade as soon as possible.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79","CWE-1321"],"references":["https://blog.sonarsource.com/nodebb-remote-code-execution-with-one-shot/","https://github.com/NodeBB/NodeBB/commit/1783f918bc19568f421473824461ff2ed7755e4c","https://github.com/NodeBB/NodeBB/releases/tag/v1.18.5","https://github.com/NodeBB/NodeBB/security/advisories/GHSA-wx69-rvg3-x7fc","https://blog.sonarsource.com/nodebb-remote-code-execution-with-one-shot/"],"products":["nodebb:nodebb"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-43787","score":0.01317,"percentile":0.70796,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-wx69-rvg3-x7fc","url":"https://osv.dev/vulnerability/GHSA-wx69-rvg3-x7fc","summary":"XSS via prototype pollution in NodeBB ","modified":"2026-07-08T06:28:24.545510977Z","packages":[{"ecosystem":"npm","name":"nodebb","purl":"pkg:npm/nodebb","ranges":[">=1.15.0 <1.18.5"],"fixed":["1.18.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}