Home/CVE/The ajax component was excluded from the default logged-in-user check in the administrative area. This behavior was pote
CVE

CVE-2026-21629

The ajax component was excluded from the default logged-in-user check in the administrative area. This behavior was pote

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.

HIGH · CVSS 7.3 EPSS 1e-05
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-284Improper Access Control
▤

Affected Products & Versions

2
joomla joomla\!>= 3.0.0 and < 5.4.4
joomla joomla\!>= 6.0.0 and < 6.0.4
▣

Scoring & Timeline

7.3
HIGH · CVSS v3.1 · security@joomla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Apr 2026 · 10:16 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://developer.joomla.org/security-centre/1027-20260301-core-acl-hardening-in-com-ajax.htmlVendor Advisory
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