CVE-2021-26036

An issue was discovered in Joomla! 2.5.0 through 3.9.27. Missing validation of input could lead to a broken usergroups table.

CVE-2021-26038

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.

CVE-2021-26035

An issue was discovered in Joomla! 3.0.0 through 3.9.27. Inadequate escaping in the rules field of the JForm API leads to a XSS vulnerability.

CVE-2021-26037

An issue was discovered in Joomla! 2.5.0 through 3.9.27. CMS functions did not properly termine existing user sessions when a user's password was changed or the user was blocked.

CVE-2021-26039

An issue was discovered in Joomla! 3.0.0 through 3.9.27. Inadequate escaping in the imagelist view of com_media leads to a XSS vulnerability.