CVE-2026-117554
Medium · 4.3CVSS
4.3
EPSS
0.3%
Published
Oct 27, 2026
CISA due date
—
The record
Admidio before 5.0.17 contains an improper access control vulnerability that allows authenticated members to register event guests by submitting the additional_guests field when guests are disallowed. Attackers can set additional_guests to the remaining seat count in modules/events/events_function.php to exhaust event capacity and block other members from registering.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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