AUGUST 4, 2026
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Case File

CVE-2026-4020

HIGH · CVSS 7.5 EPSS 41.83%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2026-03-31 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. It affects WordPress. Its EPSS score suggests a 41.8% probability of exploitation in the next 30 days. Exploitation may require the attacker to be authenticated.

CVE
CVE-2026-4020
Severity
HIGH
CVSS
7.5
EPSS
41.83%
WordPress

Original NVD Description

The Gravity SMTP plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.1.4. This is due to a REST API endpoint registered at /wp-json/gravitysmtp/v1/tests/mock-data with a permission_callback that unconditionally returns true, allowing any unauthenticated visitor to access it. When the ?page=gravitysmtp-settings query parameter is appended, the plugin's register_connector_data() method populates internal connector data, causing the endpoint to return approximately 365 KB of JSON containing the full System Report. This makes it possible for unauthenticated attackers to retrieve detailed system configuration data including PHP version, loaded extensions, web server version, document root path, database server type and version, WordPress version, all active plugins with versions, active theme, WordPress configuration details, database table names, and any API keys/tokens configured in the plugin.