CVE-2021-43787
9.0 · CRITICALOverview
CVE-2021-43787 is a critical-severity vulnerability affecting nodebb nodebb. It was published on November 29, 2021 and has a CVSS 3.1 base score of 9.0 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from nodebb. Update nodebb to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| nodebb | nodebb | 1.15.5 | Affected |
References
Frequently Asked Questions
What is CVE-2021-43787?
CVE-2021-43787 is a critical-severity vulnerability affecting nodebb nodebb. It was published on November 29, 2021 and has a CVSS 3.1 base score of 9.0 (CRITICAL).
How severe is CVE-2021-43787?
This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-43787?
Check the references section for vendor advisories and patches from nodebb. Update nodebb to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-43787?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-43787 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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