CVE-2026-77991

Joomla Extension - joomlaeventmanager.net - Privileged remote code execution in Joomla Event Manager < 5.0.1

Published Aug 27, 2026 CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed
Description
Joomla Extension - joomlaeventmanager.net - Privileged remote code execution in Joomla Event Manager < 5.0.1 - The administrator source model allows to write dangerous file type incl. PHP, leading to remote code execution.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
References
History
Type Values Removed Values Added
First Time appeared Joomlaeventmanager.net
Joomlaeventmanager.net jem - Joomla Event Manager Extension For Joomla
Vendors & Products Joomlaeventmanager.net
Joomlaeventmanager.net jem - Joomla Event Manager Extension For Joomla
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Joomla Extension - joomlaeventmanager.net - Privileged remote code execution in Joomla Event Manager < 5.0.1 - The administrator source model allows to write dangerous file type incl. PHP, leading to remote code execution.
Title Joomla Extension - joomlaeventmanager.net - Privileged remote code execution in Joomla Event Manager < 5.0.1
Weaknesses CWE-434
References
Metrics cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Joomla
Published
Updated
Aug 28, 2026, 7:47 AM
Reserved
Aug 21, 2026, 7:05 PM
Status
Deferred
Published
Aug 27, 2026, 6:17 AM
Modified
Aug 28, 2026, 4:09 PM