CVE-2021-44162
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 · uneditedChain Sea ai chatbot system’s specific file download function has path traversal vulnerability. The function has improper filtering of special characters in URL parameters, which allows a remote attacker to download arbitrary system files without authentication.
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 confidenceA path traversal vulnerability exists in Chain Sea ai chatbot system's file download function due to improper filtering of special characters in URL parameters. Attackers can manipulate path traversal sequences (e.g., ../../) in URL parameters to access arbitrary system files outside the intended directory, without authentication.
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 dataall versionsCVSS 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
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.
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Identify if Chinasea Qb Smart Service Robot is deployedLocate the system or service running the Chinasea Qb Smart Service Robot product. Check system inventory, network assets, or documentation for this specific product name.Affected if The Chinasea Qb Smart Service Robot is present in the environment.
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Verify the file download function is accessibleIdentify the file download endpoint in the ai chatbot system. This is typically a web endpoint that handles file retrieval requests. Check if the endpoint responds to HTTP requests without authentication.Affected if The file download function is exposed and accessible via network.
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Inspect URL parameter handling for path traversal charactersSend a test request to the file download endpoint with path traversal sequences in the URL parameter (e.g., ../../etc/passwd or ../../windows/win.ini). Compare the response to see if the system returns files outside the intended directory.Affected if The system returns arbitrary files when path traversal sequences are used in URL parameters.
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Check if input validation exists on the file download functionReview any available logs, configuration files, or application code related to the file download function. Look for input sanitization or validation logic that filters special characters like ../ or ..\.Affected if No input validation or path sanitization is implemented on the file download function.
The environment is affected if Chinasea Qb Smart Service Robot is deployed and the file download function allows path traversal sequences to access files outside the intended directory.
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 dataImplement strict input validation and path sanitization on the file download function to reject special characters and validate that requested paths remain within allowed directories.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2021-44162 — 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-2021-44162 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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- 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