KylinApplication · Apache
CVE-2020-13925
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 · uneditedSimilar to CVE-2020-1956, Kylin has one more restful API which concatenates the API inputs into OS commands and then executes them on the server; while the reported API misses necessary input validation, which causes the hackers to have the possibility to execute OS command remotely. Users of all previous versions after 2.3 should upgrade to 3.1.0.
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 confidenceApache Kylin contains a command injection vulnerability in a RESTful API endpoint. The affected API concatenates user-supplied input directly into OS commands without proper input validation or sanitization, allowing remote attackers to execute arbitrary OS commands on the server.
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
KylinApplication
>= 2.3.0, < 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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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Identify installed Apache Kylin versionLocate the Kylin installation directory and find the version file or check the version via the Kylin REST API (typically at /kylin/api/version). Compare the version number against the affected range: >= 2.3.0 and < 3.1.0.Affected if The installed version falls within >= 2.3.0 and < 3.1.0.
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Determine if Kylin REST API is network-accessibleVerify whether the Kylin server ports (default 7070, 8080) are exposed to untrusted networks or the public internet. Use network scanning tools or review firewall rules.Affected if The REST API endpoints are accessible from untrusted network segments.
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Check API authentication configurationReview Kylin configuration files to verify whether authentication is properly enabled on the REST API endpoints. Look for security-related settings in kylin.properties or similar configuration files.Affected if Authentication is disabled or misconfigured on the REST API.
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Inspect access logs for suspicious API requestsExamine Kylin server access logs for unusual or malformed API calls that may indicate exploitation attempts, particularly to endpoints that accept user input used in command construction.Affected if Logs show unexpected API calls with shell metacharacters or suspicious parameters.
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Verify API endpoint exposureTest whether the vulnerable RESTful API endpoints are reachable by sending a benign request (with proper authorization) and observing the response. The vulnerability exists in endpoints that construct OS commands from user input.Affected if The API endpoint that processes user input into system commands is accessible and responds to requests.
You are affected if Apache Kylin version is >= 2.3.0 and < 3.1.0 AND the RESTful API endpoint is network-accessible without proper input validation controls.
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.
dbcve · scoped3.1.0
Upgrade Apache Kylin to version 3.1.0 or later. If immediate upgrade is not feasible, restrict network access to Kylin API endpoints and implement web application firewall rules to detect and block command injection attempts.
3.1.0
- Back up your existing Kylin installation, configuration, and metadata before upgrading
- Stop the Kylin service
- Download Apache Kylin 3.1.0 from the official Apache Kylin distribution (https://kylin.apache.org/download/)
- Install Kylin 3.1.0 following the standard upgrade process in the documentation
- Verify the installation and configuration are correct
- Start the Kylin service
- Confirm the service is running and the web UI is accessible
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Kylin
Scoped from the published advisory
- Consultation4.0 h
- Implementation4.0 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 $5,504.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-13925 — 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-2020-13925 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
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