Medium severity4.3NVD Advisory· Published Oct 27, 2026· Updated Oct 27, 2026
CVE-2026-117554
CVE-2026-117554
Description
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 products
1Patches
Vulnerability mechanics
References
6- github.com/Admidio/admidio/blob/v5.0.16/modules/events/events_function.phpnvd
- github.com/Admidio/admidio/commit/5b0ee3585d2a69a6e85fee00b7b93f3ebc1e44d9nvd
- github.com/Admidio/admidio/issues/2231nvd
- github.com/Admidio/admidio/releases/tag/v5.0.17nvd
- github.com/Admidio/admidio/security/advisories/GHSA-92g9-59rr-c3qgnvd
- www.vulncheck.com/advisories/admidio-before-5.0.17-event-guest-restriction-bypass-via-events-function-phpnvd
News mentions
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