CVE-2021-43855

Published: Dic 27, 2021 Last Modified: Nov 21, 2024 EU-VD ID: EUVD-2021-30721 Aliases: GSD-2021-43855
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,2
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: required
Scope: changed
Confidentiality: high
Integrity: low
Availability: none
LOW 3,5
Source: [email protected]
Access Vector: network
Access Complexity: medium
Authentication: single
Confidentiality: none
Integrity: partial
Availability: none

Description

AI Translation Available

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 a SVG file upload made via a custom request with a fake MIME type. By creating a crafted SVG file, a malicious Wiki.js user may stage a stored cross-site scripting attack. This allows the attacker to execute malicious JavaScript when the SVG is viewed directly by other users. Scripts do not execute when loaded inside a page via normal `<img>` tags. The malicious SVG can only be uploaded by crafting a custom request to the server with a fake MIME type. A patch in version 2.5.264 fixes this vulnerability by adding an additional file extension verification check to the optional (enabled by default) SVG sanitization step to all file uploads that match the SVG mime type. As a workaround, disable file upload for all non-trusted users.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0036
Percentile
0,6th
Updated

EPSS Score Trend (Last 90 Days)

79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control Confidentiality Integrity Availability
Potential Impacts:
Bypass Protection Mechanism Read Application Data Execute Unauthorized Code Or Commands
Applicable Platforms
Technologies: AI/ML, Web Based, Web Server
Likelihood of Exploit: High
View CWE Details
Application

Wiki.Js by Requarks

Product Information
Vendor Requarks
Product Wiki.Js
Version Range Affected
To 2.5.264 (exclusive)
cpe:2.3:a:requarks:wiki.js:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/Requarks/wiki/commit/57b56d3a5b9c0035881…
Patch Third Party Advisory
https://github.com/Requarks/wiki/commit/57b56d3a5b9c00358814e76f3ee5b4bb353ad62f
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
https://github.com/Requarks/wiki/security/advisories/GHSA-4…
Exploit Patch Third Party Advisory
https://github.com/Requarks/wiki/security/advisories/GHSA-4893-pj5w-3hq9
https://github.com/Requarks/wiki/commit/57b56d3a5b9c0035881…
Patch Third Party Advisory
https://github.com/Requarks/wiki/commit/57b56d3a5b9c00358814e76f3ee5b4bb353ad62f
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
https://github.com/Requarks/wiki/security/advisories/GHSA-4…
Exploit Patch Third Party Advisory
https://github.com/Requarks/wiki/security/advisories/GHSA-4893-pj5w-3hq9