# CVE-2026-123044: ContentPen < 1.1.1 - Unauthenticated Stored XSS via API Key Disclosure

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

The ContentPen WordPress plugin before 1.1.1 discloses its REST API key to unauthenticated users, who can then use it to create posts containing unfiltered JavaScript, leading to Stored XSS that executes in the browser of any visitor, including administrators.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Unknown / ContentPen: ≥ 0; < 1.1.1 (affected, semver). Source: CNA: WPScan

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-79

## Exploit evidence

- exploit: https://wpscan.com/vulnerability/646b9448-ee17-4852-8f42-c086625e5983/ (CNA: WPScan)

## References

- https://wpscan.com/vulnerability/646b9448-ee17-4852-8f42-c086625e5983/ (CNA: WPScan; exploit, vdb-entry, technical-description)

## Provenance

- CNA: WPScan: https://www.cve.org/CVERecord?id=CVE-2026-123044; retrieved 2026-11-12; source updated 2026-11-12

Revision: a207bff8adcc480da44c19447f1becd85596bd4060743d5b11f1c697e265c93e

Canonical: https://y2.dev/cve/CVE-2026-123044

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- 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.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- 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.