CVE-2026-4020
Gravity SMTP <= 2.1.4 - Unauthenticated Sensitive Information Exposure via REST API
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.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NKey Findings
as of 2026-11-01- Its current EPSS score (73.8%) is higher than that of 59% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| RocketGenius | RocketGenius Gravity SMTP | 0 to 2.1.4 |
References
7 linksOther references
- https://www.wordfence.com/threat-intel/vulnerabilities/id/12a296db-ecc0-409b-8718-0c208504053a?source=cve
- https://www.gravityforms.com/gravity-smtp/
- https://plugins.trac.wordpress.org/browser/gravitysmtp/trunk/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L86
- https://plugins.trac.wordpress.org/browser/gravitysmtp/tags/2.1.4/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L86
- https://plugins.trac.wordpress.org/browser/gravitysmtp/trunk/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L103
- https://plugins.trac.wordpress.org/browser/gravitysmtp/tags/2.1.4/vendor/gravityforms/gravity-tools/src/Providers/class-config-collection-service-provider.php#L103
- https://docs.gravitysmtp.com/gravity-smtp-changelog/
Record Details
- Published
- 2026-03-31
- Last updated
- 2026-04-08
- Assigner (CNA)
- Wordfence
- Credited to
- Osvaldo Noe Gonzalez Del Rio
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). Alert titles and links from CISA cybersecurity alerts. This site is not affiliated with or endorsed by MITRE, NVD, CISA, or FIRST.