CVE-2021-31803 : Security Advisory and Response
Learn about CVE-2021-31803, a self-XSS vulnerability in cPanel before version 94.0.3 via EasyApache 4 Save Profile (SEC-581). Understand the impact, technical details, and mitigation steps.
This article provides detailed information about CVE-2021-31803, a vulnerability found in cPanel before version 94.0.3 that allows self-XSS via EasyApache 4 Save Profile (SEC-581).
Understanding CVE-2021-31803
This section will discuss what CVE-2021-31803 entails and its impact on affected systems.
What is CVE-2021-31803?
cPanel versions before 94.0.3 are vulnerable to a self-cross-site scripting (XSS) issue when using the EasyApache 4 Save Profile feature with SEC-581.
The Impact of CVE-2021-31803
The vulnerability allows for potential self-XSS attacks, which could lead to unauthorized actions being performed by an attacker within the cPanel interface.
Technical Details of CVE-2021-31803
In this section, we will delve into the specific technical aspects of the CVE, including the vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
cPanel versions prior to 94.0.3 are susceptible to self-XSS through the EasyApache 4 Save Profile functionality (SEC-581), enabling attackers to execute malicious scripts within the cPanel interface.
Affected Systems and Versions
All versions of cPanel before 94.0.3 are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting malicious scripts that, when executed, can perform unauthorized actions within the cPanel interface.
Mitigation and Prevention
This section will outline the necessary steps to mitigate the risks posed by CVE-2021-31803 and prevent potential exploitation.
Immediate Steps to Take
Users are strongly advised to update cPanel to version 94.0.3 or later to address the vulnerability and prevent exploitation.
Long-Term Security Practices
Implementing secure coding practices, regular security audits, and user input sanitization can help prevent similar vulnerabilities in the future.
Patching and Updates
Regularly updating cPanel installations and applying security patches is crucial to maintaining a secure environment and protecting against potential threats.