--- title: "CVE-2026-4020: Gravity SMTP <= 2.1.4 - Unauthenticated… | CubePath" 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…" language: en source: https://cubepath.com/security/cve/CVE-2026-4020 --- # CVE-2026-4020: Gravity SMTP <= 2.1.4 - Unauthenticated… | CubePath ## 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. Official description from the CVE record, published by Wordfence. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-4020) ## Key data ### CVSS 3.1 High 7.5 Score published by Wordfence in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | None | No effect on the trustworthiness of data. | | Availability impact | None | No effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.73799 (73.8% probability) Percentile 99.5% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA assessment as of Apr 2, 2026 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Automatable yes Technical impact partial ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-200](https://cwe.mitre.org/data/definitions/200.html) Exposure of Sensitive Information to an Unauthorized Actor ## Affected products Products listed in the CVE record, as the CNA published them. - RocketGenius Gravity SMTP - affected: up to 2.1.4 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [wordfence.com/threat-intel/vulnerabilities/id/12a296db-ecc0…](https://www.wordfence.com/threat-intel/vulnerabilities/id/12a296db-ecc0-409b-8718-0c208504053a?source=cve) - [gravityforms.com/gravity-smtp](https://www.gravityforms.com/gravity-smtp/) - [plugins.trac.wordpress.org/browser/gravitysmtp/trunk/vendor…](https://plugins.trac.wordpress.org/browser/gravitysmtp/trunk/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L86) - [plugins.trac.wordpress.org/browser/gravitysmtp/tags/2.1.4/v…](https://plugins.trac.wordpress.org/browser/gravitysmtp/tags/2.1.4/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L86) - [plugins.trac.wordpress.org/browser/gravitysmtp/trunk/vendor…](https://plugins.trac.wordpress.org/browser/gravitysmtp/trunk/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L103) - [plugins.trac.wordpress.org/browser/gravitysmtp/tags/2.1.4/v…](https://plugins.trac.wordpress.org/browser/gravitysmtp/tags/2.1.4/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L103) - [docs.gravitysmtp.com/gravity-smtp-changelog](https://docs.gravitysmtp.com/gravity-smtp-changelog/) ## Timeline 1. ID reserved Mar 11, 2026 2. Record published Mar 31, 2026 3. Record last updated Apr 8, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:02 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)