CVE-2026-117554: admidio admidio

Admidio before 5.0.17 Event Guest Restriction Bypass via events_function.php

CVSS 5.3 MediumEPSS 0.0029 · 21st percentile

Published by the CVE Program (CNA: VulnCheck) at 27 Oct 2026, 13:07 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
admidio	admidio pkg:composer/admidio/admidio	affected before 5.0.17 semver Other versions: unaffected

Identifiers

CVE-2026-117554

CNA

VulnCheck

Weakness (CWE)

CWE-602

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.3	Medium	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
4.3	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0029, the 21st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

27 Oct 2026, 13:07 UTC Confirmed by the CVE List
27 Oct 2026, 14:16 UTC Confirmed by NVD

Sources

References from the CNA

github.com/Admidio/admidio/issues/2231 issue-tracking
github.com/Admidio/admidio product
github.com/Admidio/admidio/security/advisories/GHSA-92g9-59rr-c3qg vendor-advisory
github.com/Admidio/admidio/commit/5b0ee3585d2a69a6e85fee00b7b93f3ebc1e44d9 patch
github.com/Admidio/admidio/releases/tag/v5.0.17 release-notes
github.com/Admidio/admidio/blob/v5.0.16/modules/events/events_function.php#L446-L462 technical-description
www.vulncheck.com/advisories/admidio-before-5.0.17-event-guest-restriction-bypass-via-events-function-php third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.