# CVE-2026-11354: Missing authorization in Participants Database

> Unauthenticated attackers can overwrite arbitrary participant records and steal sensitive personal information by manipulating the ID parameter in the Participants Database plugin.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Jul 2026
- **Updated:** 24 Jul 2026
- **Also known as:** GHSA-jjqh-m423-q994

## What is CVE-2026-11354?

CVE-2026-11354 is a medium-severity missing authorization vulnerability in xnau Participants Database, published on 24 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-11354?


## How do I fix CVE-2026-11354?

No fix has been published for CVE-2026-11354 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-11354 being exploited?

There is no known exploitation of CVE-2026-11354 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11354 and fix it if it is affected.

What it is: CVE-2026-11354 is a medium-severity missing authorization vulnerability in xnau Participants Database, published on 24 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-11354 in the wild and no public exploit code.

Affected product: xnau Participants Database. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-11354/ (Markdown: https://insights.sbomify.com/CVE-2026-11354/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11354
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11354
- OSV: https://osv.dev/vulnerability/CVE-2026-11354

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-11354/
Summaries are generated and may contain mistakes; the official description above is the record.