Is CVE-2026-109328 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-109328 being exploited in the wild.

How severe is CVE-2026-109328?

Medium severity, with a CVSS score of 6.1, published 12 October 2026.

Is there a fix for CVE-2026-109328?

Yes: fixed in 5.0.15. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-109328 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-109328?

Check whether you run Admidio at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-109328: Admidio stored cross-site scripting in registration

CVE-2026-109328 · Severity: medium · CVSS 6.1 · Published 2026-10-12

Admidio is a web-based membership management system used by organizations to manage member accounts and registrations. An unauthenticated attacker can register with a malicious name containing JavaScript code that executes in an administrator's browser when they review pending registrations, allowing the attacker to create admin accounts or steal member data.

Technologies: Admidio. Vendors: Admidio.

Quick answers

Is CVE-2026-109328 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-109328 being exploited in the wild.
How severe is CVE-2026-109328?: Medium severity, with a CVSS score of 6.1, published 12 October 2026.
Which products and versions are affected?: Admidio 5.0.0 through 5.0.14.
Is there a fix for CVE-2026-109328?: Yes: fixed in 5.0.15. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-109328 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-109328?: Check whether you run Admidio at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 5.0.15

Technical details

The vulnerability is a stored XSS in RegistrationPresenter.php where the FIRST_NAME registration parameter is inserted unencoded into a data-message HTML attribute. An unauthenticated user can submit a registration with a crafted name containing a double quote and onmouseover event handler that breaks out of the attribute context. When an administrator hovers over the entry on the Manage registrations page, the injected JavaScript executes in their authenticated session.

Affected products

Admidio Admidio 5.0.0 through 5.0.14

Timeline

2026-09-22: disclosed: GitHub security advisory published
2026-10-12: advisory: CVE-2026-109328 published on NVD

References

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