CVE-2021-43861

Incorrect sanitisation function leads to `XSS`

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Mermaid is a Javascript based diagramming and charting tool that uses Markdown-inspired text definitions and a renderer to create and modify complex diagrams. Prior to version 8.13.8, malicious diagrams can run javascript code at diagram readers' machines. Users should upgrade to version 8.13.8 to receive a patch. There are no known workarounds aside from upgrading.

Mermaid es una herramienta de diagramación y gráficos basada en Javascript que usa definiciones de texto inspiradas en Markdown y un renderizador para crear y modificar diagramas complejos. Antes de la versión 8.13.8, los diagramas maliciosos pueden ejecutar código javascript en las máquinas de los lectores de diagramas. Los usuarios deben actualizar a la versión 8.13.8 para recibir un parche. No se presentan soluciones conocidas aparte de la actualización.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-16 CVE Reserved
2021-12-30 CVE Published
2023-07-23 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (3)

URL	Tag	Source
https://github.com/mermaid-js/mermaid/releases/tag/8.13.8	Release Notes
https://github.com/mermaid-js/mermaid/security/advisories/GHSA-p3rp-vmj9-gv6v	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/mermaid-js/mermaid/commit/066b7a0d0bda274d94a2f2d21e4323dab5776d83	2023-07-21

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mermaid Project Search vendor "Mermaid Project"		Mermaid Search vendor "Mermaid Project" for product "Mermaid"				< 8.13.8 Search vendor "Mermaid Project" for product "Mermaid" and version " < 8.13.8"		node.js		Affected