CVE-2018-16169
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 Remote Service 3.0.0 to 3.1.0 allows remote authenticated attackers to upload and execute Java code file on the server via unspecified vectors.
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 Remote Service versions 3.0.0 through 3.1.0 contains an arbitrary file upload vulnerability allowing remote authenticated attackers to upload malicious Java code files to the server and execute them, resulting in remote code execution (RCE). The vulnerability stems from insufficient validation of uploaded files, likely missing checks on file type, content, and storage location.
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>= 3.0.0, <= 3.1.0CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/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 checksWork through these to decide whether this CVE applies to you.
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Confirm Cybozu Remote Service installationLocate the Cybozu Remote Service Manager installation directory and identify the installed software. This may be found in program files, application directories, or via system inventory tools.Affected if Cybozu Remote Service Manager is present on the system
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Check installed version numberRetrieve the version of Cybozu Remote Service Manager installed. Common methods include: checking the application GUI 'About' section, reviewing version info in the installation directory, or using system administration tools that list installed software with versions.Affected if The installed version falls within the range 3.0.0 to 3.1.0 inclusive
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Verify file upload functionality is accessibleDetermine whether the file upload feature in Cybozu Remote Service is accessible to authenticated users. Review user role permissions and access controls related to file attachment or upload capabilities within the application.Affected if Authenticated users have access to file upload functionality in the affected version range
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Inspect uploaded file storage configurationExamine where uploaded files are stored on the server. Check if upload directories are located within the webroot and if uploaded files retain executable extensions such as .jsp, .java, or .exe.Affected if Uploaded files are stored within the webroot or retain executable extensions without proper validation
A user is affected if Cybozu Remote Service Manager version 3.0.0 through 3.1.0 is installed and the file upload feature is accessible to authenticated users.
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 dataRestrict file upload functionality to validated, non-executable file types; store uploads outside the webroot; implement strict content-type and extension validation; apply security updates to upgrade beyond version 3.1.0.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,448.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-16169 — 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-2018-16169 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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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