Insecure default configuration in Joomla! - CVE-2020-13763
Published: June 2, 2020 / Updated: October 19, 2020
Vulnerability identifier: #VU28530
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-13763
CWE-ID: CWE-16
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform XSS attack.
The vulnerability exists due to the default settings of the global "textfilter" configuration doesn't block HTML inputs for 'Guest' users. A remote user can inject and execute arbitrary HTML code in victim's browser in context of the website.
Affected software
Joomla!
How to mitigate CVE-2020-13763
Install updates from vendor's website.
Joomla! - update to 3.9.19