Improper access control in Joomla! - CVE-2021-26038
Published: July 7, 2021
Vulnerability identifier: #VU54578
CSH Severity: Medium
CVSS v4: 7.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-26038
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions within the com_installer component. the iInstall action in com_installer lacks the required hardcoded ACL checks for superusers. A remote unprivileged user can compromise the affected installation of Joomla! under certain circumstances.
Affected software
Joomla!
How to mitigate CVE-2021-26038
Install updates from vendor's website.
Joomla! - update to 3.9.28