CVE-2026-11354: CWE-862 Missing Authorization in xnau Participants Database
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.
AI Analysis
Technical Summary
CVE-2026-11354 is a missing authorization vulnerability (CWE-862) in the xnau Participants Database WordPress plugin. It affects all versions up to 2.7.8.3. An attacker can exploit the 'id' parameter to overwrite arbitrary participant records without authentication. By obtaining a valid nonce from public pages, the attacker can submit POST requests to update any record and then retrieve the private access link, which is redirected to an attacker-controlled email address. This grants full read and edit access to sensitive participant data including names, emails, phone numbers, and other collected fields.
Potential Impact
The vulnerability allows unauthenticated attackers to modify and access sensitive personally identifiable information stored in the Participants Database plugin. This includes the ability to overwrite participant records and hijack private access links, leading to exposure and potential misuse of names, email addresses, phone numbers, and other data fields. The CVSS score of 5.3 reflects a medium severity impact with no confidentiality loss but integrity compromise.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict access to the Participants Database plugin and monitor for suspicious activity related to record updates. Avoid exposing public signup or record forms if possible.
CVE-2026-11354: CWE-862 Missing Authorization in xnau Participants Database
Description
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.
CVSS v3.1
Score 5.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-11354 is a missing authorization vulnerability (CWE-862) in the xnau Participants Database WordPress plugin. It affects all versions up to 2.7.8.3. An attacker can exploit the 'id' parameter to overwrite arbitrary participant records without authentication. By obtaining a valid nonce from public pages, the attacker can submit POST requests to update any record and then retrieve the private access link, which is redirected to an attacker-controlled email address. This grants full read and edit access to sensitive participant data including names, emails, phone numbers, and other collected fields.
Potential Impact
The vulnerability allows unauthenticated attackers to modify and access sensitive personally identifiable information stored in the Participants Database plugin. This includes the ability to overwrite participant records and hijack private access links, leading to exposure and potential misuse of names, email addresses, phone numbers, and other data fields. The CVSS score of 5.3 reflects a medium severity impact with no confidentiality loss but integrity compromise.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict access to the Participants Database plugin and monitor for suspicious activity related to record updates. Avoid exposing public signup or record forms if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-06-05T11:25:56.930Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a62de069c2644c7f835c475
Added to database: 07/24/2026, 03:37:42 UTC
Last enriched: 07/31/2026, 15:06:20 UTC
Last updated: 09/07/2026, 10:52:06 UTC
Views: 81
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