What is the CVSS score of CVE-2021-33829?

CVE-2021-33829 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 3.2%.

Is there a public PoC exploit available for CVE-2021-33829?

Yes, a public proof-of-concept exploit is available for CVE-2021-33829. Prioritise patching immediately. EPSS: 3.2%.

Is there a patch available for CVE-2021-33829?

Yes, a patch is available for CVE-2021-33829. Update the affected software to the latest version immediately.

Ckeditor CVE-2021-33829

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2021-06-09 cve@mitre.org

XSS Ckeditor Fedora Drupal Debian Linux

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

CVE Published

Jun 09, 2021 - 12:15 nvd

MEDIUM 6.1

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

1 npm packages depend on ckeditor4 (1 direct, 0 indirect)

Ecosystem-wide dependent count for version 4.14.0.

DescriptionNVD

A cross-site scripting (XSS) vulnerability in the HTML Data Processor in CKEditor 4 4.14.0 through 4.16.x before 4.16.1 allows remote attackers to inject executable JavaScript code through a crafted comment because --!> is mishandled.

AnalysisAI

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. A cross-site scripting (XSS) vulnerability in the HTML Data Processor in CKEditor 4 4.14.0 through 4.16.x before 4.16.1 allows remote attackers to inject executable JavaScript code through a crafted comment because --!> is mishandled. Affected products include: Ckeditor, Fedoraproject Fedora, Drupal, Debian Debian Linux. Version information: through 4.16..

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.