CVE-2018-20920 : What You Need to Know
Learn about CVE-2018-20920, a vulnerability in cPanel allowing stored XSS attacks. Find out how to mitigate the risk and secure your system with updates and best practices.
An earlier version of cPanel (prior to 70.0.23) contains a vulnerability that facilitates a stored XSS attack when performing a WHM Edit DNS Zone action (SEC-374).
Understanding CVE-2018-20920
cPanel before 70.0.23 allows stored XSS via a WHM Edit DNS Zone action (SEC-374).
What is CVE-2018-20920?
This CVE refers to a vulnerability in cPanel that enables a stored XSS attack during a WHM Edit DNS Zone action.
The Impact of CVE-2018-20920
The vulnerability allows malicious actors to execute a stored XSS attack, potentially compromising the security and integrity of the affected system.
Technical Details of CVE-2018-20920
Vulnerability Description
The vulnerability in cPanel (prior to version 70.0.23) enables a stored XSS attack when a WHM Edit DNS Zone action is performed.
Affected Systems and Versions
- Product: cPanel
- Vendor: Not applicable
- Versions affected: All versions prior to 70.0.23
Exploitation Mechanism
The vulnerability can be exploited by an attacker to inject malicious scripts into the system, leading to a stored XSS attack.
Mitigation and Prevention
Immediate Steps to Take
- Update cPanel to version 70.0.23 or later to mitigate the vulnerability.
- Regularly monitor and review DNS zone edits for any suspicious activities.
Long-Term Security Practices
- Implement strict input validation mechanisms to prevent XSS attacks.
- Educate users on safe browsing practices and the importance of avoiding suspicious links.
Patching and Updates
- Stay informed about security updates and patches released by cPanel.
- Apply patches promptly to ensure the system is protected against known vulnerabilities.