CVE-2026-21629 | BDVDB-2026-324147 Detail

Joomla! ProjectJoomla! CMS

Description#

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.

Impact#

CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs

Weaknesses#

CWE-284 Improper Access Control

References#

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

Exploit#

No public exploit known

History#

Version 12026-04-01Record published in the CVE List.

Published

Published: 2026-04-01
Last modified: 2026-04-01

Vendor information

Vendor: Joomla! Project
Product: Joomla! CMS

All Joomla! Project vulnerabilities

Score

6.3 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 17.7.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Improper Access Control

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
3.0.0-5.4.3
Fixed
Not stated
Vulnerable
6.0.0-6.0.3
Fixed
Not stated

Scoring System

CVSS v4.0

6.3 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	Present
Privileges Required	None
User Interaction	None
Vulnerable System Confidentiality	Low
Vulnerable System Integrity	Low
Vulnerable System Availability	Low
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).