CVE-2026-78374CWE-201

CVE-2026-78374

published September 10, 2026

CVSS
6.9
EPSS
1%
Percentile
44.5
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS
6.9 · NONE
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00538 · 44.5th percentile
Weakness
CWE-201 · Insertion of Sensitive Information Into Sent Data
Published
2026-09-10T14:17Z
References (1)
https://www.joomlart.com/t4-builder/t4-joomla-page-builder · [email protected]
EPSS history
Timeline
  • 11 SEP 03:19Z
    EPSS moved — → 1%
    epss
  • 10 SEP 10:01Z
    Joomla Extension - joomlart.com - Open mail relay via contact AJAX endpoint in T4 Page Builder extension < 2.3.0
    cvelistv5