CVE-2016-4869
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 · uneditedCybozu Office 9.0.0 to 10.4.0 allow remote attackers to obtain session information via a page where CGI environment variables are displayed.
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 · high confidenceCybozu Office versions 9.0.0 through 10.4.0 contain a page that displays CGI environment variables in an unsafe manner, allowing remote attackers to obtain session information such as session IDs or cookies. This session information can then be used for session hijacking attacks.
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= 9.0= 9.1.0= 9.2.0= 9.2.1= 9.3.0= 9.3.1= 9.3.2= 9.9.0= 10.0.0= 10.0.1= 10.0.2= 10.1.0CVSS 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
- High
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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.
-
Identify Cybozu Office versionLocate the installed Cybozu Office version using the product's administrative interface, version information file, or system inventory. Common locations include the product's About dialog or installation directory documentation.Affected if The installed version falls within 9.0.0 through 10.4.0 (or matches any of the specific versions listed: 9.0, 9.1.0, 9.2.0, 9.2.1, 9.3.0, 9.3.1, 9.3.2, 9.9.0, 10.0.0, 10.0.1, 10.0.2, 10.1.0)
-
Confirm the vulnerable CGI page existsIdentify the specific page or endpoint within the Cybozu Office web interface that exposes CGI environment variables. This typically involves locating the page that outputs raw CGI variables such as HTTP_COOKIE, HTTP_SESSION_ID, or similar session-related environment variables.Affected if The page is present and accessible without authentication, displaying environment variable contents including session identifiers or cookies
-
Verify session data exposureAccess the identified CGI environment variable display page and examine the output for sensitive session information such as session IDs, cookies, or other authentication tokens that should not be visible to users.Affected if CGI environment variables containing session IDs, cookies, or other authentication credentials are visible in the page output
You are affected if Cybozu Office version 9.0.0 through 10.4.0 is installed and the vulnerable CGI page that displays environment variables is accessible, exposing session information such as session IDs or cookies.
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 dataUpgrade Cybozu Office to a version beyond 10.4.0 that contains the security patch, or restrict network access to the affected page until patching can be completed.
- Consultation4.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,968.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-4869 — 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-2016-4869 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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