CVE-2021-32622 : Vulnerability Insights and Analysis
Discover how CVE-2021-32622 impacts matrix-react-sdk versions before 3.21.0. Learn about the vulnerability, its impact, and mitigation steps to secure user uploads.
Matrix-React-SDK is a react-based SDK that allows a Matrix chat/voip client to be inserted into a web page. An issue was discovered in versions prior to 3.21.0, where the local file preview feature could execute scripts embedded in the uploaded file after user interactions. This local vulnerability can only impact the user during the upload process and has a CVSS base score of 4.2.
Understanding CVE-2021-32622
This CVE pertains to a file upload vulnerability in matrix-react-sdk versions before 3.21.0, allowing the execution of embedded scripts in the uploaded file during the local file preview feature.
What is CVE-2021-32622?
The CVE-2021-32622 vulnerability affects matrix-react-sdk, enabling local file previews to execute embedded scripts, posing a security risk to users during the upload process.
The Impact of CVE-2021-32622
The vulnerability could lead to script execution in uploaded files during the local file preview, potentially compromising user security and integrity during the upload process.
Technical Details of CVE-2021-32622
The technical details of CVE-2021-32622 are as follows:
Vulnerability Description
Before version 3.21.0 of matrix-react-sdk, the local file preview feature could inadvertently execute embedded scripts during the upload process, impacting user security.
Affected Systems and Versions
The vulnerability affects matrix-react-sdk versions earlier than 3.21.0.
Exploitation Mechanism
The vulnerability requires several user interactions to open the preview in a separate tab, triggering the execution of embedded scripts in the uploaded file.
Mitigation and Prevention
To address CVE-2021-32622, consider the following mitigation strategies:
Immediate Steps to Take
Update matrix-react-sdk to version 3.21.0 or above to patch the vulnerability and prevent script execution during the local file preview.
Long-Term Security Practices
Encourage users to avoid uploading potentially malicious files and maintain vigilance during the file upload process to prevent script execution.
Patching and Updates
Regularly update matrix-react-sdk to the latest version to ensure that known vulnerabilities, including CVE-2021-32622, are addressed and patched.