CVE-2021-24563 : Security Advisory and Response
Discover the details of CVE-2021-24563 affecting Frontend Uploader plugin in WordPress. Learn about the XSS vulnerability, its impact, affected versions, and mitigation steps.
The Frontend Uploader WordPress plugin version 1.3.2 and below is vulnerable to unauthenticated stored cross-site scripting (XSS) attacks, allowing malicious HTML files to be uploaded and executed.
Understanding CVE-2021-24563
This CVE identifies a security flaw in the Frontend Uploader WordPress plugin that enables attackers to upload malicious HTML files to execute XSS attacks.
What is CVE-2021-24563?
The Frontend Uploader plugin version 1.3.2 and earlier allows unauthenticated users to upload HTML files containing JavaScript, leading to potential XSS attacks when accessed.
The Impact of CVE-2021-24563
The vulnerability poses a significant risk as malicious actors can upload harmful HTML files, potentially leading to unauthorized access, data theft, or other malicious activities.
Technical Details of CVE-2021-24563
This section covers specific technical details related to the CVE.
Vulnerability Description
The vulnerability in the Frontend Uploader plugin allows unauthenticated users to upload HTML files containing malicious JavaScript, which can be triggered upon direct access.
Affected Systems and Versions
Version 1.3.2 and below of the Frontend Uploader WordPress plugin are affected by this CVE.
Exploitation Mechanism
Attackers exploit this vulnerability by uploading HTML files containing malicious scripts, which can be executed when accessed directly.
Mitigation and Prevention
Preventive measures to secure systems against CVE-2021-24563.
Immediate Steps to Take
- Update the Frontend Uploader plugin to the latest version to mitigate the XSS vulnerability.
- Regularly monitor and restrict file upload permissions on WordPress sites.
Long-Term Security Practices
- Implement web application firewalls to filter and block malicious file uploads.
- Educate users on secure upload practices to prevent uploading malicious content.
Patching and Updates
Stay informed about security patches released by plugin developers and apply them promptly to safeguard against known vulnerabilities.