CVE-2021-24760 : What You Need to Know

The Gutenberg PDF Viewer Block WordPress plugin before version 1.0.1 is affected by a stored Cross-Site Scripting vulnerability that allows users with a role as low as Contributor to execute attacks.

Understanding CVE-2021-24760

This CVE involves a security flaw in the Gutenberg PDF Viewer Block plugin, enabling unauthorized users to perform Cross-Site Scripting attacks.

What is CVE-2021-24760?

The Gutenberg PDF Viewer Block plugin version less than 1.0.1 fails to properly sanitize and escape its block, leading to a Cross-Site Scripting vulnerability.

The Impact of CVE-2021-24760

This vulnerability could be exploited by users with limited roles like Contributors to inject malicious scripts into the plugin, potentially compromising the integrity of affected WordPress sites.

Technical Details of CVE-2021-24760

The technical details of CVE-2021-24760 include:

Vulnerability Description

The Gutenberg PDF Viewer Block plugin before 1.0.1 does not properly sanitize its block, allowing for stored Cross-Site Scripting attacks.

Affected Systems and Versions

Product: Gutenberg PDF Viewer Block
Vendor: Unknown
Versions Affected: Less than 1.0.1

Exploitation Mechanism

Unauthorized users, such as Contributors, can exploit this vulnerability to inject malicious scripts into the plugin.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-24760, consider the following steps:

Immediate Steps to Take

Update the Gutenberg PDF Viewer Block plugin to version 1.0.1 or higher.
Limit the permissions of users to reduce the impact of potential attacks.

Long-Term Security Practices

Regularly monitor and audit plugins for known vulnerabilities.
Educate users about the risks of executing untrusted scripts on websites.

Patching and Updates

Stay informed about security patches and updates released by the plugin vendor to address identified vulnerabilities.