CVE-2026-1947

High

Published: 16 March 2026

Published

16 March 2026

Modified

22 April 2026

KEV Added

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Patch

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CVSS Score 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Score 0.0002 6.1th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-1947 is a high-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in Wordpress (inferred from references). Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 6.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique.

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions

addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement

addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1565.001 Stored Data Manipulation Impact

Adversaries may insert, delete, or manipulate data at rest in order to influence external outcomes or hide activity, thus threatening the integrity of the data.

attack.mitre.org →

Why these techniques?

IDOR in public-facing WordPress plugin enables remote unauthenticated exploitation (T1190) and direct stored data overwrite (T1565.001).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 9.1.9 via the submit_nex_form() function due to missing validation on a user controlled key. This…

makes it possible for unauthenticated attackers to to overwrite arbitrary form entries via the 'nf_set_entry_update_id' parameter.

Deeper analysisAI

CVE-2026-1947 is an Insecure Direct Object Reference vulnerability (CWE-639) in the NEX-Forms – Ultimate Forms Plugin for WordPress, affecting all versions up to and including 9.1.9. The flaw exists in the submit_nex_form() function due to missing validation of a user-controlled key, specifically the 'nf_set_entry_update_id' parameter.

Unauthenticated attackers can exploit this vulnerability over the network with low complexity and no user interaction required, as indicated by its CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N). Successful exploitation allows attackers to overwrite arbitrary form entries, leading to high integrity impact without affecting confidentiality or availability.

Advisories and patches are referenced in the WordPress plugins trac changeset at https://plugins.trac.wordpress.org/changeset/3470888/nex-forms-express-wp-form-builder and Wordfence threat intelligence at https://www.wordfence.com/threat-intel/vulnerabilities/id/b2a8c307-2430-4ea9-afe0-e5e758eabdd1?source=cve.