CVE-2026-8747 — The Function CheckComment Of The File Zb_system/Function/C_s Vulnerability

title: CVE-2026-8747 - Z-BlogPHP CheckComment Improper Authorization
id: scw-2026-05-17-ai-1
status: experimental
level: high
description: |
  Detects exploitation attempts against CVE-2026-8747 in Z-BlogPHP 1.7.4.3430. This rule specifically targets the 'CheckComment' function within the 'zb_system/function/c_system_event.php' file, which is vulnerable to improper authorization. The presence of 'CheckComment' in the URI query string is a strong indicator of an attempted exploit.
author: SCW Feed Engine (AI-generated)
date: 2026-05-17
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8747/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/zb_system/function/c_system_event.php'
      cs-uri-query|contains:
          - 'CheckComment'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse