CVE-2026-28189

The Participants Database plugin (participants-database) for WordPress by xnau webdesign up to version 2.7.8.5 contains an authorization bypass through user-controlled key vulnerability. This allows exploitation of incorrectly configured access control security levels. The issue affects versions from n/a through 2.7.8.5.

The Participants Database plugin (participants-database) for WordPress by xnau webdesign is vulnerable to deserialization of untrusted data, allowing Object Injection. The issue affects versions up to and including 2.7.8.5.

The Participants Database plugin (participants-database) for WordPress by xnau webdesign contains an SQL Injection vulnerability (improper neutralization of special elements in an SQL command) enabling blind SQL injection. The issue affects versions up to and including 2.7.8.5.

The Participants Database WordPress plugin before version 2.7.8.4 does not properly sanitize and escape a user-supplied parameter before using it in a SQL query. This allows unauthenticated attackers to perform SQL injection attacks.

The Participants Database plugin versions up to 2.7.8.3 allow unauthenticated arbitrary file deletion.

The Participants Database plugin versions up to 2.7.8.3 contain an unauthenticated SQL injection vulnerability. An attacker can send crafted requests to execute arbitrary SQL queries.

The Participants Database plugin for WordPress up to version 2.7.8.3 is vulnerable to Sensitive Information Exposure via the 'id' parameter. An unauthenticated attacker can overwrite any participant record and hijack the private access link, gaining full read and edit access to personal data.

The Participants Database plugin for WordPress versions 2.7.8.4 and earlier contains a broken access control vulnerability exploitable by a Subscriber-level user.

The Participants Database plugin by xnau webdesign has a stored XSS vulnerability due to improper neutralization of input during web page generation. Affects versions up to and including 2.7.6.3.