CVE-2021-32070
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 · uneditedThe MiCollab Client Service component in Mitel MiCollab before 9.3 could allow an attacker to perform a clickjacking attack due to an insecure header response. A successful exploit could allow an attacker to modify the browser header and redirect users.
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 confidenceMitel MiCollab Client Service before version 9.3 is vulnerable to clickjacking due to missing or insecure HTTP security headers. Attackers can embed the application in an invisible iframe on a malicious page, tricking users into performing unintended actions. The 'insecure header response' indicates missing protections like X-Frame-Options or Content-Security-Policy frame-ancestors directives.
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< 9.3CVSS 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
- Required
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 checksWork through these to decide whether this CVE applies to you.
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Verify MiCollab installation and versionAccess the MiCollab web administration interface or check the installed software package version. Common locations include the application itself or system inventory. Compare your installed version against the affected range (versions prior to 9.3).Affected if The installed MiCollab Client Service version is below 9.3
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Identify the MiCollab web endpointDetermine the URL where the MiCollab Client Service web interface is accessible. This is typically on port 443 or 8443, often under paths like /micollab or similar. Consult your network documentation if needed.Affected if The web interface is accessible over HTTP/HTTPS on your network
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Check for X-Frame-Options headerSend an HTTP GET request to the MiCollab web endpoint (e.g., using curl -I https://your-micollab-server:port/path) and inspect the response headers for the presence of X-Frame-Options. The header should be present with value DENY or SAMEORIGIN.Affected if The X-Frame-Options header is missing from HTTP responses, or the application can be embedded in an iframe on a different origin
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Check for Content-Security-Policy frame-ancestorsInspect the HTTP response headers from the MiCollab web interface for a Content-Security-Policy header that includes the frame-ancestors directive. This directive specifies valid parents for embedding.Affected if The Content-Security-Policy header is missing or does not include frame-ancestors, allowing the application to be framed by untrusted origins
You are affected if MiCollab Client Service version is below 9.3 AND the web interface responses lack both X-Frame-Options and Content-Security-Policy frame-ancestors headers, allowing clickjacking via iframe embedding.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor data9.3
Upgrade to MiCollab 9.3 or later. If immediate patching is not possible, configure the web server to include X-Frame-Options: DENY or SAMEORIGIN and implement Content-Security-Policy with frame-ancestors directive to prevent the application from being embedded in iframes.
- Consultation4.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-32070 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-32070 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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