# CVE-2026-120561: JetFormBuilder <= 3.6.2 - Missing Authorization to Unauthenticated JetEngine Options Page Modification

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'do_action' function in the 'Update_Options' action class in all versions up to, and including, 3.6.2. This makes it possible for unauthenticated attackers to modify JetEngine Options Page values when an administrator has configured a form with the "Update Options" post-submission action. The vulnerability requires that both JetFormBuilder and JetEngine are installed and active, and that an administrator has specifically configured a form with the Update Options action.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- jetmonsters / JetFormBuilder — Dynamic Blocks Form Builder: ≥ 0; ≤ 3.6.2 (affected, semver). Source: CNA: Wordfence

## Severity and prioritization

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N; source: CNA: Wordfence

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N; source: NVD: security@wordfence.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-862

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/b0fe7d29-118f-42fb-9e48-6217faaa689b?source=cve (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/trunk/compatibility/jet-engine/actions/update-options.php#L50 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.3.12/compatibility/jet-engine/actions/update-options.php#L50 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/trunk/compatibility/jet-engine/actions/update-options.php#L75 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.3.12/compatibility/jet-engine/actions/update-options.php#L75 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/trunk/compatibility/jet-engine/actions/update-options.php#L82 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.3.12/compatibility/jet-engine/actions/update-options.php#L82 (CNA: Wordfence)

- https://plugins.trac.wordpress.org/changeset/3575346/ (CNA: Wordfence)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.3.12/compatibility/jet-engine/actions/update-options.php#L50 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.3.12/compatibility/jet-engine/actions/update-options.php#L75 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/tags/3.3.12/compatibility/jet-engine/actions/update-options.php#L82 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/trunk/compatibility/jet-engine/actions/update-options.php#L50 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/trunk/compatibility/jet-engine/actions/update-options.php#L75 (security@wordfence.com)

- https://plugins.trac.wordpress.org/browser/jetformbuilder/trunk/compatibility/jet-engine/actions/update-options.php#L82 (security@wordfence.com)

- https://plugins.trac.wordpress.org/changeset/3575346/ (security@wordfence.com)

- https://www.wordfence.com/threat-intel/vulnerabilities/id/b0fe7d29-118f-42fb-9e48-6217faaa689b?source=cve (security@wordfence.com)

## Provenance

- CNA: Wordfence: https://www.cve.org/CVERecord?id=CVE-2026-120561; retrieved 2026-11-03; source updated 2026-11-03

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-120561; retrieved 2026-11-03; source updated 2026-11-03

Revision: c1c16827c8898685334cbf36d0deebb20c81ffdd59e1eca2d0b389ac6bfad5c5

Canonical: https://y2.dev/cve/CVE-2026-120561

## Agent and API access

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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.

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