CVE-2020-11001 Explained : Impact and Mitigation

In Wagtail before versions 2.8.1 and 2.7.2, a cross-site scripting (XSS) vulnerability exists on the page revision comparison view within the Wagtail admin interface. Learn about the impact, technical details, and mitigation steps for this CVE.

Understanding CVE-2020-11001

This CVE involves a potential XSS attack in Wagtail versions prior to 2.8.1 and 2.7.2.

What is CVE-2020-11001?

A cross-site scripting (XSS) vulnerability in Wagtail's admin interface allows users with limited-permission editor accounts to craft malicious page revision histories that can be exploited by users with higher privileges.

The Impact of CVE-2020-11001

CVSS Base Score: 5.8 (Medium Severity)
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Confidentiality Impact: High
Integrity Impact: None
Scope: Changed
Exploitation: Requires user interaction

Technical Details of CVE-2020-11001

Vulnerability Description

The vulnerability allows for the execution of arbitrary scripts in the context of the Wagtail admin interface, potentially leading to unauthorized actions.

Affected Systems and Versions

Product: Wagtail
Versions Affected: >=1.9.0, < 2.7.2 and >= 2.8.0, < 2.8.1

Exploitation Mechanism

Exploitation involves crafting a malicious page revision history that, when viewed by a user with higher privileges, can lead to actions being performed using that user's credentials.

Mitigation and Prevention

Immediate Steps to Take

Upgrade to patched versions: Wagtail 2.7.2 (for LTS 2.7 branch) or Wagtail 2.8.1 (for the current 2.8 branch)
Restrict access to the Wagtail admin interface for users with limited permissions

Long-Term Security Practices

Regularly review and update access control policies
Educate users on safe browsing practices and potential security risks

Patching and Updates

Stay informed about security advisories and updates from Wagtail
Apply security patches promptly to mitigate known vulnerabilities