WordPress security changelog
MEDIUM CVE-2026-11354 Deferred

Participants Database public forms permit record takeover and PII access

Participants Database through 2.7.8.3 exposes a nonce on public forms but does not bind an unauthenticated action=update submission's numeric id to the visitor's private pid. An attacker can overwrite another participant record, replace its email address and then use action=retrieve to receive the private access link, exposing and permitting edits to the record's collected personal information.

CVE / CNA score 5.3 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Participants Database
Plugin slug
participants-database
Affected
<= 2.7.8.3
Safe version
2.7.8.4
Published
Jul 24, 2026
Weakness
CWE-862 — Missing Authorization

This CVE was published Jul 24, 2026 and is one of 11 known issues for this plugin.

What to do

Update, patch or deactivate.

Update Participants Database to 2.7.8.4 or later. Its application fix binds id to get_participant_id($_POST['pid']) and uses action-specific nonces before processing an unauthenticated update. Review recently changed participant email addresses and private-link retrieval activity.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

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

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.

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

References

Primary and upstream sources