In Joomla! 3.x before 3.9.12, inadequate escaping allowed XSS attacks using the logo parameter of the default templates.
https://developer.joomla.org/security-centre/791-20190901-core-xss-in-logo-parameter-of-default-templates.html
Source: Mitre, NVD
Published: 2019-09-24
Updated: 2019-09-25
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N