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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-43856 Detail

Description

Wiki.js is a wiki app built on Node.js. Wiki.js 2.5.263 and earlier is vulnerable to stored cross-site scripting through non-image file uploads for file types that can be viewed directly inline in the browser. By creating a malicious file which can execute inline JS when viewed in the browser (e.g. XML files), a malicious Wiki.js user may stage a stored cross-site scripting attack. This allows the attacker to execute malicious JavaScript when the file is viewed directly by other users. The file must be opened directly by the user and will not trigger directly in a normal Wiki.js page. A patch in version 2.5.264 fixes this vulnerability by adding an optional (enabled by default) force download flag to all non-image file types, preventing the file from being viewed inline in the browser. As a workaround, disable file upload for all non-trusted users. --- Thanks to @Haxatron for reporting this vulnerability. Initially reported via https://huntr.dev/bounties/266bff09-00d9-43ca-a4bb-bb540642811f/


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/Requarks/wiki/commit/79bdd4409316adf649806de3e22352297f85cee0 Patch  Third Party Advisory 
https://github.com/Requarks/wiki/commit/79bdd4409316adf649806de3e22352297f85cee0 Patch  Third Party Advisory 
https://github.com/Requarks/wiki/releases/tag/2.5.264 Release Notes  Third Party Advisory 
https://github.com/Requarks/wiki/releases/tag/2.5.264 Release Notes  Third Party Advisory 
https://github.com/Requarks/wiki/security/advisories/GHSA-rhpf-929m-7fm2 Exploit  Patch  Third Party Advisory 
https://github.com/Requarks/wiki/security/advisories/GHSA-rhpf-929m-7fm2 Exploit  Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') cwe source acceptance level NIST   GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-43856
NVD Published Date:
12/27/2021
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.