Auth bypass in Nodebb
CVE-2021-43786
Nodebb is an open source Node.js based forum software. In affected versions incorrect logic present in the token verification step unintentionally allowed master token access to the API. The vulnerability has been patch as of v1.18.5. Users are advised to upgrade as soon as possible.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.024 (83.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.024 · change: +0.001
Affected products
- Nodebb — versions >= 1.15.0, < 1.18.5
Weakness classification (CWE)
References
- github.com/NodeBB/NodeBB/releases/tag/v1.18.5 (Third Party Advisory, Release Notes)
- github.com/NodeBB/NodeBB/security/advisories/GHSA-hf2m-j98r-4fqw (Third Party Advisory)
- github.com/NodeBB/NodeBB/commit/04dab1d550cdebf4c1567bca9a51f8b9ca48a500 (Patch, Third Party Advisory)
- blog.sonarsource.com/nodebb-remote-code-execution-with-one-shot/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-43786?
- CVE-2021-43786 is a critical-severity vulnerability in Nodebb, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-11-29.
- How severe is CVE-2021-43786?
- Critical severity. CVSS v3 base score is 9.8 out of 10.