CVE-2021-43786— API token verification can be bypassed
Quick assessment
Affected
NodeBB NodeBB
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
NodeBB是Design Create Play团队的一套使用Node.js（一套建立在Google V8 JavaScript引擎之上的网络应用平台）构建的论坛系统。 Nodebb 中存在授权问题漏洞，该漏洞源于产品的令牌验证逻辑错误。攻击者可通过该漏洞使用master令牌访问API。以下产品及版本受到影响：Nodebb v1.18.5 之前版本。
Possible ATT&CK Techniques 1 AI
T1078 · Valid Accounts
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I. Basic Information for CVE-2021-43786
Vulnerability Information
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Vulnerability Title
API token verification can be bypassed
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
NodeBB 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NodeBB是Design Create Play团队的一套使用Node.js（一套建立在Google V8 JavaScript引擎之上的网络应用平台）构建的论坛系统。 Nodebb 中存在授权问题漏洞，该漏洞源于产品的令牌验证逻辑错误。攻击者可通过该漏洞使用master令牌访问API。以下产品及版本受到影响：Nodebb v1.18.5 之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-43786
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2021-43786 (1)
Vendor Advisories for CVE-2021-43786 (1)
-
https://github.com/NodeBB/NodeBB/security/advisories/GHSA-hf2m-j98r-4fqw x_refsource_CONFIRM
Security Blog Posts for CVE-2021-43786 (1)
Other References for CVE-2021-43786 (1)
-
https://github.com/NodeBB/NodeBB/releases/tag/v1.18.5 x_refsource_MISC
Same Patch Batch · NodeBB · 2021-11-29 · 3 CVEs total
| CVE-2021-43787 | 9.0 CRITICAL | XSS via prototype pollution |
| CVE-2021-43788 | 5.0 MEDIUM | Path traversal in translator module of NobeBB |
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Same weakness: CWE-287
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V. Comments for CVE-2021-43786
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