CVE-2021-25967 : Vulnerability Insights and Analysis

A detailed overview of the Stored Cross-Site Scripting (XSS) vulnerability in CKAN versions 2.9.0 to 2.9.3 via SVG File Upload.

Understanding CVE-2021-25967

This CVE describes a vulnerability in CKAN versions 2.9.0 to 2.9.3 that allows attackers to execute stored XSS attacks via SVG file uploads.

What is CVE-2021-25967?

CKAN versions 2.9.0 to 2.9.3 are vulnerable to stored XSS attacks through the upload of SVG profile pictures. This enables low-privileged users to embed malicious scripts in their profile pictures for execution on victims' browsers.

The Impact of CVE-2021-25967

The vulnerability poses a medium severity threat with a CVSS base score of 5.4, allowing attackers to potentially execute arbitrary scripts in the context of the victim's browser.

Technical Details of CVE-2021-25967

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability arises from improper validation of SVG file uploads, enabling attackers to inject and execute malicious scripts through user profile pictures.

Affected Systems and Versions

CKAN versions 2.9.0 to 2.9.3 are confirmed to be affected by this CVE.

Exploitation Mechanism

Attackers can upload crafted SVG files as profile pictures, leveraging this vector to embed and execute malicious scripts in victim browsers.

Mitigation and Prevention

Measures to address and mitigate the risks associated with CVE-2021-25967.

Immediate Steps to Take

Ensure the immediate adoption of security measures such as input validation, file type restrictions, and user input sanitization to prevent exploitation.

Long-Term Security Practices

Implement a robust security policy, educate users on safe upload practices, and conduct regular security audits to detect and address vulnerabilities promptly.

Patching and Updates

Apply the necessary patches or updates released by CKAN to remediate the vulnerability and enhance the overall security posture of the application.