---
id: CVE-2018-25438
title: Intermesh Group-Office < 3.5.5 Path Traversal via compress.php
summary: >-
  Intermesh Group-Office 3.3.0 before 3.5.5 contains an unauthenticated path
  traversal vulnerability in compress.php that allows remote attackers to read
  arbitrary files by manipulating the 'file' parameter. Attackers can send GET
  requests…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-22
vendor: Intermesh
product: Group-Office
affected:
  - Group-Office >= 3.3.0 < 3.5.5
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T10:57:25.404Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2018-25438'
references:
  - url: 'https://cxsecurity.com/issue/WLB-2018020249'
    label: CXSecurity WLB-2018020249
  - url: >-
      https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/other/groupoffice-lfi.yaml
    label: Nuclei Template
  - url: 'https://www.group-office.com/'
    label: Product Homepage
  - url: >-
      https://www.vulncheck.com/advisories/intermesh-group-office-3.5.5-path-traversal-via-compress-php
    label: >-
      VulnCheck Advisory: Intermesh Group-Office < 3.5.5 Path Traversal via
      compress.php
tags:
  - cve.org
ingestedAt: '2026-10-22T11:37:02.345Z'
---

## Overview

Intermesh Group-Office 3.3.0 before 3.5.5 contains an unauthenticated path traversal vulnerability in compress.php that allows remote attackers to read arbitrary files by manipulating the 'file' parameter. Attackers can send GET requests to /compress.php with '../' sequences in the 'file' parameter, which is appended to the cache path and passed to readfile(), to read files such as /etc/passwd. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-21.

## Affected

- `Group-Office >= 3.3.0 < 3.5.5`

## Remediation

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