CVE-2026-48904

critical

Published 2026-05-26 · Modified 2026-05-26

CVSS v3

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2

—

VIR risk

9.8

Description

An improper access check allows privelege escalation through the com_users group editing webservice endpoint.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: security@joomla.org — https://developer.joomla.org/security-centre/1046-20260514-core-privilege-escalation-through-com-users-webservice-endpoints.html

Application impact

Vendor	Product	Versions	Fixed
joomla	joomla\!	`{"startIncluding":"4.0.0","endExcluding":"5.4.6"}`	`5.4.6`

References

https://developer.joomla.org/security-centre/1046-20260514-core-privilege-escalation-through-com-users-webservice-endpoints.html

CWEs

CWE-284

Verify integrity in audit chain (admin only). AS-IS.