Vulnerability DatabaseCVE-2026-90913
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CVE-2026-90913
Published:September 29, 2026
Updated:October 11, 2026
Joomla! Core - [20260903] - Core - Improper ACL checks for access level webservice endpoints in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - An improper access check allows unauthorized users to perform mutation actions in access level endpoints.
Affected Packages
https://github.com/joomla/joomla-cms.git (GITHUB):
Affected version(s) >=5.0.0-alpha1 <5.4.9
Fix Suggestion:
Update to version 5.4.9
https://github.com/joomla/joomla-cms.git (GITHUB):
Affected version(s) >=6.0.0-alpha1 <6.1.4
Fix Suggestion:
Update to version 6.1.4
Related Resources (2)
https://developer.joomla.org/security-centre/1083-20260903-core-improper-acl-checks-for-user-level-webservice-endpoints.html
https://www.joomla.org/
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CVSS v4
Base Score:
7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Access Control
CWE-284
EPSS
Base Score:
0.21