CVE-2021-43787: XSS via prototype pollution
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.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-43787.
What is the severity of CVE-2021-43787?
The severity of CVE-2021-43787 is critical with a CVSS score of 6.1.
What is Nodebb?
Nodebb is an open source Node.js based forum software.
How does the prototype pollution vulnerability in Nodebb affect users?
The vulnerability allows a malicious user to inject arbitrary data into the DOM, potentially leading to an account takeover.
Which versions of Nodebb are affected by the prototype pollution vulnerability?
Versions between 1.15.5 and 1.18.4 of Nodebb are affected by the prototype pollution vulnerability.
How can I fix the prototype pollution vulnerability in Nodebb?
To fix the vulnerability, upgrade to Nodebb version 1.18.5 or later.
Where can I find more information about CVE-2021-43787?
More information about CVE-2021-43787 can be found in the references provided.