CVE-2021-24378 : Security Advisory and Response
Learn about CVE-2021-24378 affecting Autoptimize plugin before 2.7.8. Understand the impact, technical details, and mitigation steps against Authenticated Stored XSS vulnerability.
The Autoptimize WordPress plugin before version 2.7.8 is affected by an Authenticated Stored Cross-Site Scripting (XSS) vulnerability that allows a high privilege user to upload a malicious file containing JavaScript code.
Understanding CVE-2021-24378
This CVE identifies a security issue in the Autoptimize WordPress plugin that enables an attacker to execute malicious JavaScript code through file uploads.
What is CVE-2021-24378?
The CVE-2021-24378 vulnerability in Autoptimize plugin version 2.7.8 and below allows an authenticated user to upload an archive with JavaScript code that executes when a victim accesses a specific file within the plugin directory.
The Impact of CVE-2021-24378
Exploitation of this vulnerability can lead to Cross-Site Scripting (XSS) attacks, enabling potential attackers to perform various malicious actions, such as stealing sensitive information or performing unintended actions on behalf of the victim.
Technical Details of CVE-2021-24378
This section provides a deeper insight into the specifics of the vulnerability.
Vulnerability Description
The flaw occurs due to insufficient validation of uploaded files, specifically .html files, via the 'Import Settings' feature, allowing attackers to inject JavaScript code.
Affected Systems and Versions
Autoptimize versions prior to 2.7.8 are affected by this vulnerability.
Exploitation Mechanism
An authenticated high privilege user can exploit the vulnerability by uploading a malicious file containing JavaScript code embedded within an archive. When a victim visits the specific index.html file, the code gets executed, leading to a successful attack.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-24378, immediate actions are necessary to enhance security.
Immediate Steps to Take
Users should update Autoptimize to version 2.7.8 or newer to patch the vulnerability. Additionally, exercise caution when uploading files and disable unnecessary features to reduce the attack surface.
Long-Term Security Practices
Practicing secure coding, regularly updating plugins, and monitoring file uploads are vital for maintaining a secure WordPress environment.
Patching and Updates
Regularly check for security updates from plugin developers and apply patches promptly to safeguard against known vulnerabilities.