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

Quick assessment

Affected
opencats OpenCATS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 0.10.0 之前的 OpenCATS 版本中，文件 存在一个缺失授权检查的漏洞。该漏洞允许任何已认证用户通过系统配置的 SMTP 中继发送邮件。具有“读取”权限的用户可以通过提供 和 参数，将固定的测试邮件发送至任意收件人，并伪造发件人地址（From 地址）。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-112784

Vulnerability Information
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Vulnerability Title
OpenCATS before 0.10.0 Missing Authorization via ajax/testEmailSettings.php
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
opencats OpenCATS 0 ~ 0.10.0 -

II. Public POCs for CVE-2026-112784

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III. Intelligence Information for CVE-2026-112784

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Patches & Fixes for CVE-2026-112784 (1)

Vendor Advisories for CVE-2026-112784 (1)

Proof of Concept for CVE-2026-112784 (1)

Vendor Pages for CVE-2026-112784 (1)

Other References for CVE-2026-112784 (1)

Same Patch Batch · opencats · 2026-10-20 · 6 CVEs total

CVE-2026-112786 5.4 MEDIUM OpenCATS before 0.10.0 Missing Authorization via Import Revert Action
CVE-2026-112787 4.3 MEDIUM OpenCATS before 0.10.0 Missing Authorization in Reports Module EEO Reports
CVE-2026-112783 4.3 MEDIUM OpenCATS before 0.10.0 Missing Authorization via Activity AJAX Endpoints
CVE-2026-112785 4.3 MEDIUM OpenCATS before 0.10.0 Missing Authorization in Saved-List AJAX Endpoints
CVE-2026-113349 4.3 MEDIUM OpenCATS before 0.10.0 Missing Authorization in Calendar editEvent/deleteEvent

IV. Related Vulnerabilities

Same product: OpenCATS
Same vendor: opencats
Same weakness: CWE-862

V. Comments for CVE-2026-112784

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