CVE-2026-78374
Received
Received - Intake
Open Mail Relay in T4 Page Builder Extension
Vulnerability report for CVE-2026-78374, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-09-10
Last updated on: 2026-09-10
Assigner: Joomla! Project
Description
Description
Joomla Extension - joomlart.com - Open mail relay via contact AJAX endpoint in T4 Page Builder extension < 2.3.0 - The front-end JSON editor endpoint exposes an action called contact that requires no authentication, no CSRF token, no captcha (when no captcha plugin is enabled) and has no rate limiting. The attacker fully controls the recipient, subject and HTML body, and the mail is sent from the site's configured sender identity (mailfrom/fromname).
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| joomlart | t4_page_builder | to 2.3.0 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-201 | The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor. |
