An issue was discovered in Joomla! 2.5.0 through 3.9.27. Install action in cominstaller lack the required hardcoded ACL checks for superusers. A default system is not affected cause the default ACL for cominstaller is limited to super users already.
{ "versions": [ { "introduced": "2.5.0" }, { "last_affected": "3.9.27" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26038.json"