CVE-2021-43787

XSS via prototype pollution

State: Published
Severity: 9.0 Critical
Published: Nov 29, 2021
Updated: Aug 4, 2024
Reserved: Nov 16, 2021

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.

Scores

CVSS	Score	Vector	Source
3.1	9.0 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected Products

Product	Versions
NodeBBNodeBB	>= 1.15.5, < 1.18.5Affected

References

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