dbcve.org
MicollabApplication · Mitel

CVE-2021-32067

MEDIUM · 6.5 CVSS v3.1 Published 2021-08-13
Fix available
A fix is available. Upgrade to 9.3 or later.
See remediation →
74/100
Remediation priority · Elevated
Remotely reachable No privileges 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
The MiCollab Client Service component in Mitel MiCollab before 9.3 could allow an attacker to view sensitive system information through an HTTP response due to insufficient output sanitization.

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

This is an information disclosure vulnerability in Mitel MiCollab's Client Service component. Due to insufficient output sanitization, the application returns sensitive system information in HTTP responses that should have been filtered or encoded. An authenticated or potentially unauthenticated attacker could exploit this to gather reconnaissance information about the target system.

MitigationUpgrade to Mitel MiCollab version 9.3 or later. If immediate patching is not possible, implement network segmentation to restrict access to the MiCollab Client Service and deploy WAF rules to detect and block anomalous HTTP responses.

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
MicollabApplication
Affected:< 9.3

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
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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. Confirm MiCollab installation and version
    Locate the MiCollab installation directory or check the system inventory for 'Mitel MiCollab' or 'MiCollab' software. Use the administrative web interface or check installed packages to determine the exact version number installed.
    Affected if The installed version is lower than 9.3 (for example, 9.2.x, 9.1.x, or earlier)
  2. Identify Client Service component exposure
    Determine if the MiCollab Client Service component is accessible on the network. This service typically handles HTTP/HTTPS requests. Check firewall rules and network accessibility for ports associated with MiCollab web services.
    Affected if The Client Service is exposed to the network (especially untrusted networks) without proper access controls
  3. Test HTTP response for information disclosure
    Send a crafted HTTP request to the MiCollab Client Service endpoint (such as a login page, API endpoint, or diagnostic path). Capture and inspect the HTTP response body for sensitive system information that should not be exposed, such as internal paths, version details, error messages, or configuration data.
    Affected if The HTTP response contains sensitive system information that should have been sanitized, filtered, or encoded
  4. Verify authentication requirements
    Determine whether the affected endpoint requires authentication. Test accessing Client Service URLs without credentials to check if unauthenticated users can trigger the information disclosure.
    Affected if The vulnerable endpoint responds with sensitive information without requiring valid authentication credentials

You are affected if MiCollab version is below 9.3 AND the Client Service is accessible to allow attackers to retrieve sensitive system information via HTTP responses.

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 9.3 or later
Fixed in 9.3
Interim mitigation

Upgrade to Mitel MiCollab version 9.3 or later. If immediate patching is not possible, implement network segmentation to restrict access to the MiCollab Client Service and deploy WAF rules to detect and block anomalous HTTP responses.

Recommended fix Moderate confidence

MiCollab 9.3

  1. Verify current MiCollab version through the administration console or system information
  2. Review Mitel MiCollab upgrade documentation for version 9.3
  3. Ensure backups of current configuration and data are completed before upgrade
  4. Schedule maintenance window as upgrades may require service interruption
  5. Download MiCollab version 9.3 or later from Mitel's authorized distribution channels
  6. Follow Mitel's documented upgrade procedure for MiCollab, applying the update through the standard upgrade path
  7. After upgrade, verify the MiCollab Client Service component is functioning correctly
  8. Confirm the HTTP response sanitization is working by reviewing system behavior
Caveat Review MiCollab 9.3 release notes for any configuration or compatibility changes from previous versions

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

Fix this in Micollab Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2021-32067 in production — separate from our analysis above.

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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