CVE-2026-77991
Critical
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.
SeverityCritical
CVSS9.4
Exploit probability—
ProductJEM - Joomla Event Manager extension for Joomla
PublishedAug 27, 2026
First seenAug 27, 2026
Weakness typeCWE-434Unrestricted upload of dangerous file type
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| joomlaeventmanager.net JEM - Joomla Event Manager extension for Joomla | 1.0.0-5.0.0 | — |
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