SB2021031518 - Self-XSS in cPanel

Description

This security bulletin contains information about 1 security vulnerability.

1) Self-XSS (CVE-ID: N/A)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when attempting to save an EasyApache profile with the same name as an existing profile. A remote attacker can trick the victim to inject a specially crafted HTML and script into the profile page and execute it in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install update from vendor's website.

References

• https://news.cpanel.com/cpanel-tsr-2021-0002-announcement/
• https://news.cpanel.com/cpanel-tsr-2021-0002-full-disclosure/