CVE-2021-4418 : Security Advisory and Response
Discover the implications of CVE-2021-4418, a CSRF vulnerability in the Custom CSS, JS & PHP plugin for WordPress, allowing attackers to execute unauthorized code snippets.
A detailed overview of CVE-2021-4418, a vulnerability found in the Custom CSS, JS & PHP plugin for WordPress that could lead to Cross-Site Request Forgery attacks.
Understanding CVE-2021-4418
In this section, we will delve into what CVE-2021-4418 entails and its potential implications.
What is CVE-2021-4418?
The Custom CSS, JS & PHP plugin for WordPress is susceptible to Cross-Site Request Forgery (CSRF) in versions up to, and including, 2.0.7. The vulnerability arises from missing or incorrect nonce validation on the save() function, allowing unauthenticated attackers to execute malicious actions.
The Impact of CVE-2021-4418
This security flaw permits unauthorized users to save code snippets via a forged request, provided they can deceive a site administrator into performing an action by, for instance, clicking on a manipulated link.
Technical Details of CVE-2021-4418
Explore the technical aspects of CVE-2021-4418 to better understand the vulnerability's nature and scope.
Vulnerability Description
The vulnerability allows attackers to exploit missing or inaccurate nonce validation in the Custom CSS, JS & PHP plugin's save() function, enabling them to execute unauthorized code snippets.
Affected Systems and Versions
Versions up to and including 2.0.7 of the Custom CSS, JS & PHP plugin for WordPress are impacted by this CSRF vulnerability.
Exploitation Mechanism
The vulnerability can be exploited by tricking a site administrator into taking an action, like clicking on a link, which in turn enables unauthenticated attackers to submit malicious code.
Mitigation and Prevention
Learn about the necessary steps to mitigate the risks posed by CVE-2021-4418 and how to prevent similar vulnerabilities in the future.
Immediate Steps to Take
Site administrators should update the Custom CSS, JS & PHP plugin to version 2.0.8 or higher to patch the CSRF vulnerability and prevent unauthorized code execution.
Long-Term Security Practices
Enhance overall security posture by regularly updating WordPress plugins, educating users on safe browsing practices, and implementing multi-factor authentication.
Patching and Updates
Stay informed about security updates released by plugin developers and promptly apply patches to eliminate known vulnerabilities and protect your website from potential exploits.