CVE-2026-21629 PUBLISHED

Joomla! Core - [20260301] - ACL hardening in com_ajax

Assigner: Joomla
Reserved: 01.01.2026 Published: 01.04.2026 Updated: 01.04.2026

The ajax component was excluded from the default logged-in-user check in the administrative area. This behavior was potentially unexpected by 3rd party developers.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS Score: 6.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	Present	Availability	Low	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Joomla! Project
Product	Joomla! CMS
Versions	Default: unaffected Version 3.0.0-5.4.3 is affected Version 6.0.0-6.0.3 is affected

Credits

Joomla Security Strike Team finder

References

https://developer.joomla.org/security-centre/1027-20260301-core-acl-hardening-in-com-ajax.html

Problem Types

CWE-284 Improper Access Control CWE

Impacts

CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs