# CVE-2026-16304: WP Event Manager < 3.4.2 - Subscriber+ Arbitrary Post Takeover via event_organizer_ids

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

The WP Event Manager  WordPress plugin before 3.4.2 does not properly validate ownership or the type of the user-supplied post identifiers processed by one of its frontend forms, allowing any user with a Subscriber account or above to reassign the authorship of arbitrary posts to themselves and to force them to be published. This results in content takeover and in the public disclosure of otherwise private or draft content, and requires the relevant frontend feature to be enabled.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Unknown / WP Event Manager: ≥ 0; < 3.4.2 (affected, semver). Source: CNA: WPScan

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-639

## Exploit evidence

- exploit: https://wpscan.com/vulnerability/53d611e2-4ca6-4117-bc33-040488c19a72/ (CNA: WPScan)

## References

- https://wpscan.com/vulnerability/53d611e2-4ca6-4117-bc33-040488c19a72/ (CNA: WPScan; exploit, vdb-entry, technical-description)

## Provenance

- CNA: WPScan: https://www.cve.org/CVERecord?id=CVE-2026-16304; retrieved 2026-11-05; source updated 2026-11-05

Revision: 0406c0e56bde90fd458f9801a4ba972ec87c2b51af13b6583f50ea021bff39ed

Canonical: https://y2.dev/cve/CVE-2026-16304

## Agent and API access

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- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

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- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.