CVE-2026-112784OpenCATS before 0.10.0 Missing Authorization via ajax/testEmailSettings.php

Description

OpenCATS before 0.10.0 contains a missing authorization vulnerability in ajax/testEmailSettings.php that allows any authenticated user to send mail through the configured SMTP relay. Read-level users can supply testEmailAddress and fromAddress parameters to send the fixed test message to any recipient with a spoofed From address.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://github.com/opencats/OpenCATS/issues/720 issue-tracking
• https://github.com/opencats/OpenCATS/commit/aa3b414c3672f5010ca26c44192aa8e72d3735bd patch
• OpenCATS v0.10.0 Release Notes release-notes
• https://github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5e09c1aff0cd/ajax/testEmailSettings.php technical-description
• VulnCheck Advisory: OpenCATS before 0.10.0 Missing Authorization via ajax/testEmailSettings.php third-party-advisory