CVE-2021-32862

High

not-fixedNot Available

Security vulnerability in nbconvert

Description

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).

Impact Assessment

This high-severity vulnerability could allow attackers to gain unauthorized access, execute arbitrary code, or compromise data integrity. Prompt remediation is strongly recommended.

Attack Characteristics

Attack Vector

NETWORK

Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

CVSS v3.1 Score

7.5

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

1.38%

Probability of exploitation in the next 30 days · more likely than 71.4% of all CVEs.

Quick Facts

PublishedJan 1, 1

Last ModifiedJan 1, 1

Discovered ByIndependent Security Researcher

Statusnot-fixed

Weakness Types

CWE-79

Unknown CWE

This vulnerability is associated with CWE-79. This type of weakness can lead to security issues if not properly addressed.

Attack Metrics

CVSS v3.1 Metrics Breakdown

attack Vector

NETWORK

attack Complexity

HIGH

privileges Required

LOW

user Interaction

NONE

scope

Unchanged

confidentiality Impact

High

integrity Impact

High

availability Impact

High

Remediation Guide

How to Fix This Vulnerability

Remediation Steps

1Review and audit affected systems for potential exploitation
2Implement additional security controls if immediate patching is not possible
3Monitor for suspicious activity related to this vulnerability

Mitigation Strategies

Network Segmentation

High

Isolate affected systems from untrusted networks until patching is complete

Monitoring and Detection

Medium

Implement enhanced monitoring for exploitation attempts and unusual behavior

Event History

Vulnerability Timeline

Vulnerability published

0001-01-01T00:00:00Z

published

▪ Common questions

How severe is CVE-2021-32862?

CVE-2021-32862 is rated HIGH with a CVSS score of 7.5 (attack vector: NETWORK).

What kind of weakness is CVE-2021-32862?

CVE-2021-32862 is classified as CWE-79 — Security vulnerability in nbconvert.

Back to All Vulnerabilities

CVE-2021-32862

High

not-fixedNot Available

Security vulnerability in nbconvert

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Description

Impact Assessment

This high-severity vulnerability could allow attackers to gain unauthorized access, execute arbitrary code, or compromise data integrity. Prompt remediation is strongly recommended.

Attack Characteristics

Attack Vector

NETWORK

Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

CVSS v3.1 Score

7.5

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

1.38%

Probability of exploitation in the next 30 days · more likely than 71.4% of all CVEs.

Quick Facts

PublishedJan 1, 1

Last ModifiedJan 1, 1

Discovered ByIndependent Security Researcher

Statusnot-fixed

Weakness Types

CWE-79

Unknown CWE

This vulnerability is associated with CWE-79. This type of weakness can lead to security issues if not properly addressed.

Attack Metrics

CVSS v3.1 Metrics Breakdown

attack Vector

NETWORK

attack Complexity

HIGH

privileges Required

LOW

user Interaction

NONE

scope

Unchanged

confidentiality Impact

High

integrity Impact

High

availability Impact

High

Remediation Guide

How to Fix This Vulnerability

Remediation Steps

1Review and audit affected systems for potential exploitation
2Implement additional security controls if immediate patching is not possible
3Monitor for suspicious activity related to this vulnerability

Mitigation Strategies

Network Segmentation

High

Isolate affected systems from untrusted networks until patching is complete

Monitoring and Detection

Medium

Implement enhanced monitoring for exploitation attempts and unusual behavior

Event History

Vulnerability Timeline

Vulnerability published

0001-01-01T00:00:00Z

published

▪ Common questions

How severe is CVE-2021-32862?

CVE-2021-32862 is rated HIGH with a CVSS score of 7.5 (attack vector: NETWORK).

What kind of weakness is CVE-2021-32862?

CVE-2021-32862 is classified as CWE-79 — Security vulnerability in nbconvert.

Back to All Vulnerabilities