xnau Participants Database Plugin up to 2.7.8.3 on WordPress ID information disclosure

Summaryinfo

A vulnerability, which was classified as problematic, was found in xnau Participants Database Plugin up to 2.7.8.3. This affects an unknown part. Executing a manipulation of the argument ID can lead to information disclosure. This vulnerability is handled as CVE-2026-11354. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in xnau Participants Database Plugin up to 2.7.8.3 and classified as problematic. This vulnerability affects some unknown functionality. The manipulation of the argument id with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

The Participants Database plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.7.8.3 via the 'id' parameter. This makes it possible for unauthenticated attackers to overwrite arbitrary participant records by numeric ID and redirect the private_id-bearing record-access link to an attacker-controlled email address, granting full read and edit access to the victim's stored personally identifiable information including names, email addresses, phone numbers, and any other fields collected in the participant database. An attacker can harvest a valid nonce with a plain unauthenticated GET request to any page rendering the public signup or record form, then POST action=update with an arbitrary id value to overwrite any record; chaining a subsequent action=retrieve then delivers the private-access link to the attacker-controlled mailbox.

The advisory is available at wordfence.com. This vulnerability was named CVE-2026-11354 since 06/05/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/24/2026). This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• xnau

Name

• Participants Database Plugin

Version

• 2.7.8.0
• 2.7.8.1
• 2.7.8.2
• 2.7.8.3

CPE 2.3info

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CPE 2.2info

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