Participants Database: Authorization bypass through a user-controlled key

A low-privilege authenticated attacker can supply a user-controlled key that bypasses authorization in Participants Database. The CNA vector indicates limited confidentiality, integrity and availability impact. The exact WordPress role, key, endpoint, target object and affected operation are not disclosed; those omissions prevent a more specific input-to-operation account. Affected versions: at most 2.7.8.5.

CVE / CNA score 6.3 CVSS 3.1 · audit@patchstack.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: Participants Database
Plugin slug: participants-database
Affected: <= 2.7.8.5
Safe version: See mitigation notes
Published: Oct 20, 2026
Weakness: CWE-639 — Authorization Bypass Through User-Controlled Key

This CVE was published Oct 20, 2026 and is one of 16 known issues for this plugin.

What to do

Update, patch or deactivate.

This archive could not verify a fixed version because current official author release notes could not be retrieved or located. This archive's uncertainty does not establish that the vendor has not fixed the issue. Restrict or disable the affected feature where warranted and consult the author. Official notes: https://wordpress.org/plugins/participants-database/#developers. Check the caller permission for the selected object and operation before accepting a client-supplied key; do not treat knowledge of an identifier as authorization.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

Authorization Bypass Through User-Controlled Key vulnerability in xnau webdesign Participants Database participants-database allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Participants Database: from n/a through 2.7.8.5.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

References

Primary and upstream sources

Data attribution: This product uses the NVD API but is not endorsed or certified by the NVD.

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