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Open Xchange AppsuiteApplication · Open Xchange

CVE-2017-13667

CRITICAL · 9.9 CVSS v3.0 Published 2019-05-23
Fix available
A fix is available. Upgrade to after 7.8.4 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
OX Software GmbH OX App Suite 7.8.4 and earlier is affected by: SSRF.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

OX App Suite 7.8.4 and earlier contains a Server-Side Request Forgery (SSRF) vulnerability that allows an attacker to make the server perform arbitrary requests to internal or external resources, potentially accessing internal services, bypassing firewalls, or exfiltrating data.

MitigationImplement strict allowlist-based URL validation for all user-supplied URLs, restrict server-side request capabilities to trusted domains, and apply network segmentation to limit lateral movement from compromised servers.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Open Xchange AppsuiteApplication
Affected:<= 7.8.4

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Determine OX App Suite version
    Locate the installed OX App Suite version by checking the package manager, about page in the admin panel, or running 'rpm -q open-xchange' or 'dpkg -l open-xchange' depending on your Linux distribution
    Affected if The installed version is 7.8.4 or any earlier version (e.g., 7.8.3, 7.8.2, 7.6.x)
  2. Identify URL-handling features
    Review enabled plugins and modules in OX App Suite admin interface, specifically looking for features that process or fetch external URLs such as document preview, link previews, or RSS feed importers
    Affected if Any URL-fetching functionality is enabled in the configuration
  3. Check URL validation configuration
    Inspect the server configuration files (typically in /opt/open-xchange/etc or /etc/opt/ox) for settings related to URL handling, allowlists, or request validation. Look for properties containing 'URL', 'uri', 'request', or 'whitelist'
    Affected if URL validation is absent, permissive, or not configured (no allowlist restrictions found)
  4. Verify network access controls
    Review firewall rules and network segmentation settings to determine if the application server has unrestricted outbound network access to internal infrastructure
    Affected if Server can initiate connections to internal services or private IP ranges without restriction

You are affected if OX App Suite version is 7.8.4 or earlier AND URL-fetching features are enabled AND URL validation is not properly configured with strict allowlists

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 7.8.4
Interim mitigation

Implement strict allowlist-based URL validation for all user-supplied URLs, restrict server-side request capabilities to trusted domains, and apply network segmentation to limit lateral movement from compromised servers.

Recommended fix Moderate confidence

OX App Suite 7.8.5 or later (7.8.x stable branch)

  1. Identify current OX App Suite version via admin panel or system information
  2. Schedule a maintenance window for the upgrade
  3. Back up current installation, including database and configuration files
  4. Upgrade OX App Suite to version 7.8.5 or later (7.8.x series beyond 7.8.4)
  5. Verify upgrade was successful by checking version number in admin interface
  6. Test critical functionality (email, calendar, contacts, drive) to ensure normal operation
  7. Review server logs for any errors during and after upgrade
Caveat Review OX App Suite 7.8.5 release notes for any configuration or feature changes that may require adjustment; ensure third-party integrations are compatible

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Open Xchange Appsuite Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2017-13667 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data