---
id: CVE-2026-112784
title: OpenCATS before 0.10.0 Missing Authorization via ajax/testEmailSettings.php
summary: >-
  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 fromA…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-862
vendor: opencats
product: OpenCATS
affected:
  - OpenCATS < 0.10.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T13:26:58.302892Z'
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T13:27:10.134Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112784'
references:
  - url: 'https://github.com/opencats/OpenCATS/issues/720'
  - url: >-
      https://github.com/opencats/OpenCATS/commit/aa3b414c3672f5010ca26c44192aa8e72d3735bd
  - url: 'https://github.com/opencats/OpenCATS/releases/tag/v0.10.0'
    label: OpenCATS v0.10.0 Release Notes
  - url: >-
      https://github.com/opencats/OpenCATS/blob/5781f41814f09493c7ce05b9251b5e09c1aff0cd/ajax/testEmailSettings.php
  - url: >-
      https://www.vulncheck.com/advisories/opencats-before-0.10.0-missing-authorization-via-ajax-testemailsettings-php
    label: >-
      VulnCheck Advisory: OpenCATS before 0.10.0 Missing Authorization via
      ajax/testEmailSettings.php
tags:
  - cve.org
ingestedAt: '2026-10-20T12:05:07.326Z'
---

## Overview

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.

## Affected

- `OpenCATS < 0.10.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.