# CVE-2026-109329: Admidio broken access control in role member assignment

Source: https://junglewise.ai/threats/cve-2026-109329-admidio-4-3-2-through-4-3-17-and-5-0-0-before-5-0-15-contains-a  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-109329 · Severity: medium · CVSS 6.5 · Published 2026-10-12

Admidio is a web-based member management system used by organizations to manage user accounts and roles across multiple organization instances. A flaw in the role member-assignment feature allows a low-privileged administrator in one organization to bypass access controls and gain privileged access to unrelated organizations, potentially compromising user data and enabling account manipulation in those organizations.

Technologies: [Admidio](https://junglewise.ai/threats/technologies/admidio). Vendors: [Admidio](https://junglewise.ai/threats/vendors/admidio).

## Quick answers

**Is CVE-2026-109329 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109329 being exploited in the wild.

**How severe is CVE-2026-109329?** Medium severity, with a CVSS score of 6.5, published 12 October 2026.

**Which products and versions are affected?** Admidio 4.3.2 through 4.3.17, 5.0.0 before 5.0.15.

**Is there a fix for CVE-2026-109329?** Yes: fixed in Admidio 4.3.18, 5.0.15. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-109329 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-109329?** 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 Admidio 4.3.18, 5.0.15

## Technical details

The vulnerability is a broken access control flaw in members_assignment.php that fails to verify whether a target role belongs to the attacker's organization before allowing membership assignment. An authenticated role administrator can craft requests with a foreign role UUID to assign themselves or other users to privileged roles in different organizations, bypassing organization-scoped authorization checks. Once assigned, the attacker can log into the target organization and exercise the injected role's privileges, such as user profile editing.

## Affected products

- Admidio Admidio 4.3.2 through 4.3.17, 5.0.0 before 5.0.15

## Timeline

- 2026-09-22: disclosed
- 2026-10-12: advisory

## References

- [https://github.com/Admidio/admidio/security/advisories/GHSA-ggch-5cpv-rvqx](https://github.com/Admidio/admidio/security/advisories/GHSA-ggch-5cpv-rvqx)
- [https://www.vulncheck.com/advisories/admidio-4.3.2-through-4.3.17-and-5.0.0-before-5.0.15-cross-organization-access-control-bypass-via-members-assignment-php](https://www.vulncheck.com/advisories/admidio-4.3.2-through-4.3.17-and-5.0.0-before-5.0.15-cross-organization-access-control-bypass-via-members-assignment-php)

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