The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
An issue was discovered in Joomla! 2.5.0 through 3.9.27. Install action in com_installer lack the required hardcoded ACL checks for superusers. A default system is not affected cause the default ACL for com_installer is limited to super users already.
Base Score: 4.3
Impact Score: 2.9
Exploitability Score: 8.6
Base Score: 7.5
Impact Score: 3.6
Exploitability Score: 3.9
cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:* versions from 2.5.0 to 3.9.27 (inclusive)