CVSS 10.0CVSS 10.0 · CRITICAL

CVE-2026-16940File deletion in Custom Fields WordPress plugin

The Custom Fields WordPress plugin before 1.5.1 does not validate a user-supplied file path before deletion, allowing unauthenticated users to delete arbitrary files on the server (such as wp-config.php), which can lead to a full site takeover.

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Analysis

El plugin Custom Fields para WordPress permite a atacantes no autenticados eliminar archivos arbitrarios del servidor. Al borrar archivos críticos como wp-config.php, un atacante puede reiniciar el proceso de instalación y tomar control total del sitio.

Relevant roles

PhpBackendCyberSecurity

Severity

Score: 10.0(CRITICAL)

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

AV: NETWORK

AC: LOW

PR: NONE

UI: NONE

S: CHANGED

C: NONE

I: HIGH

A: HIGH

Weakness (CWE): CWE-22

EPSS

Probability of exploitation (next 30 days): 0.0017 (0.2%)

Percentile: 6.3%

EPSS: 2026-08-06

Technical description

Published: 8/5/2026, 7:16:36 AM

Last modified: 8/6/2026, 4:16:37 PM

References

https://wpscan.com/vulnerability/a315a6ac-3ffb-4735-92ca-6e85338f8807/

How to read this card

Actively exploited

KEV (Known Exploited Vulnerabilities) is CISA's catalog of CVEs confirmed as actively exploited in the real world. If a CVE is on KEV, someone is already using it in attacks.

CVSS 10.0

CVSS 10.0 — máxima severidad teórica. Explotable de forma remota, sin privilegios, con impacto total. Aún no confirmada como explotada en el mundo real, pero parchea ya.

AI-recommended

Un modelo de lenguaje revisó el CVE y consideró que afecta a software ampliamente desplegado o herramientas comunes de desarrollo. Un humano del equipo aprobó la publicación antes de que llegara aquí.

Categorías de impacto que evalúa la IA

widely_deployed_infra — kernel Linux, OpenSSL, glibc, k8s, Docker, nginx, OpenSSH.

popular_dev_tooling — Node.js, Python, Go, React, Next.js, librerías comunes de npm/pip.

common_consumer_software — Chrome, Firefox, Windows, macOS, apps móviles populares.

enterprise_saas — GitHub, GitLab, Atlassian, Salesforce, Cisco, Fortinet, Ivanti.

niche_software — CMS regionales, herramientas de hobby, librerías de poco uso.

not_relevant — firmware específico de proveedor, software descontinuado.

EPSS — EPSS (Exploit Prediction Scoring System) by FIRST.org estimates the probability that a CVE will be exploited in the next 30 days. Range is 0 to 1; very fresh CVEs typically score low until evidence accumulates.