CVE-2026-27423: Roland Barker Participants Database broken access control

CVE-2026-27423 · Severity: medium · CVSS 4.3 · Published 2026-07-23

The Participants Database plugin for WordPress, which is used to manage and display lists of people or members, contains a security flaw in its access control mechanisms. This vulnerability allows a user with basic 'Subscriber' level permissions to perform actions they should not be authorized to do. While the impact is considered low, it could allow unauthorized modifications to database entries or settings depending on the specific functions exposed.

Technologies: Xnau Webdesign Participants Database. Vendors: Xnau Webdesign.

Quick answers

Is CVE-2026-27423 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-27423 being exploited in the wild.
How severe is CVE-2026-27423?
Medium severity, with a CVSS score of 4.3, published 23 July 2026.
Which products and versions are affected?
Xnau Webdesign Participants Database <= 2.7.8.4.
Is there a fix for CVE-2026-27423?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-27423 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-27423?
Check whether you run Xnau Webdesign Participants Database 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.

Technical details

A broken access control vulnerability exists in the Participants Database plugin for WordPress (versions up to and including 2.7.8.4) due to missing authorization checks (CWE-862). An attacker authenticated with low-level 'Subscriber' privileges can exploit this flaw via network requests to execute functions or modify data that should be restricted to higher-privileged users. The vulnerability has a CVSS score of 4.3, indicating a partial impact on integrity with no impact on confidentiality or availability. As of the advisory date, no official patch has been confirmed, and users are advised to monitor for updates from the developer.

Affected products

  • Roland Barker (xnau webdesign) Participants Database <= 2.7.8.4

Timeline

  • 2025-10-24: other: Vulnerability reported by researcher Legion Hunter
  • 2026-07-22: advisory: Advisory published by Patchstack
  • 2026-07-23: disclosed: CVE published to NVD dataset

References

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