CVE-2021-32862

nbconvert vulnerable to cross-site scripting (XSS) via multiple exploit paths

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The GitHub Security Lab discovered sixteen ways to exploit a cross-site scripting vulnerability in nbconvert. When using nbconvert to generate an HTML version of a user-controllable notebook, it is possible to inject arbitrary HTML which may lead to cross-site scripting (XSS) vulnerabilities if these HTML notebooks are served by a web server (eg: nbviewer).

GitHub Security Lab detectó dieciséis formas de explotar una vulnerabilidad de tipo cross-site scripting en nbconvert. Cuando es usado nbconvert para generar una versión HTML de un cuaderno controlable por el usuario, es posible inyectar HTML arbitrario que puede conllevar a vulnerabilidades de tipo cross-site scripting (XSS) si estos cuadernos HTML son servidos por un servidor web (por ejemplo: nbviewer).

*Credits: N/A

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

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-05-12 CVE Reserved
2022-08-18 CVE Published
2024-03-10 EPSS Updated
2024-09-02 CVE Updated
2024-09-02 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

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

CAPEC

References (3)

URL	Tag	Source
https://github.com/jupyter/nbviewer/security/advisories/GHSA-h274-fcvj-h2wm	Broken Link
https://lists.debian.org/debian-lts-announce/2023/06/msg00003.html	Mailing List

URL	Date	SRC
https://github.com/jupyter/nbconvert/security/advisories/GHSA-9jmq-rx5f-8jwq	2024-09-02

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Jupyter Search vendor "Jupyter"		Nbconvert Search vendor "Jupyter" for product "Nbconvert"				<= 6.2.0 Search vendor "Jupyter" for product "Nbconvert" and version " <= 6.2.0"		python		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected