CVE-2026-77990 PUBLISHED

Joomla Extension - joomlaeventmanager.net - Attendee lists readable by any logged-in user in Joomla Event Manager < 5.0.1

Assigner: Joomla
Reserved: 21.08.2026 Published: 27.08.2026 Updated: 27.08.2026

Joomla Extension - joomlaeventmanager.net - Attendee lists readable by any logged-in user in Joomla Event Manager < 5.0.1 - A non-manager can therefore read attendee names, usernames, registration dates and statuses for events they do not manage, including lists belonging to unpublished events.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 5.3

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

CVSS 4.0

Product Status

Vendor	joomlaeventmanager.net
Product	JEM - Joomla Event Manager extension for Joomla
Versions	Default: unaffected Version 1.0.0-5.0.0 is affected

Credits

Phil Taylor, mysites.guru finder

References

https://www.joomlaeventmanager.net/

Problem Types

CWE-639: Authorization Bypass Through User-Controlled Key CWE