CVE-2026-90913
MEDIUM severity · CVSS 5.5 · Improper access control
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
Confidentiality impactHigh
Integrity impactLow
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://developer.joomla.org/security-centre/1083-20260903-core-improper-acl-checks-for-user-level-webservice-endpoints.html ↗