CVE-2021-30176
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 ZEROF Expert pro/2.0 application for mobile devices allows SQL Injection via the Authorization header to the /v2/devices/add endpoint.
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 confidenceThe ZEROF Expert pro/2.0 mobile application contains a SQL Injection vulnerability in the Authorization header when processing requests to the /v2/devices/add API endpoint. Attackers can exploit this by injecting malicious SQL queries through the Authorization header to manipulate the application's database.
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= 2.0CVSS 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 if ZEROF Expert pro/2.0 is in useLocate and verify the installed version of the ZEROF Expert mobile application on the device or check the deployed backend service versionAffected if The application version is confirmed to be exactly 2.0 (Zerof Expert)
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Verify API endpoint exposureCheck network logs or configuration to determine if the /v2/devices/add API endpoint is accessible and receiving requestsAffected if The /v2/devices/add endpoint is exposed and actively handling Authorization header data
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Confirm database interaction with Authorization headerInspect application logs or database query traces to verify that the Authorization header value is being used in SQL queries without parameterizationAffected if The Authorization header input is being directly incorporated into SQL statements without prepared statements or input sanitization
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Check for SQL injection vulnerabilityIf authorized, send a test request to /v2/devices/add with a crafted Authorization header containing SQL syntax (e.g., "' OR '1'='1") and observe if unexpected database behavior occursAffected if SQL syntax in the Authorization header produces different application behavior compared to a normal value, indicating successful injection
You are affected if the ZEROF Expert mobile application version 2.0 is deployed and the /v2/devices/add API endpoint processes Authorization header input directly into SQL queries without parameterized statements.
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 parameterized queries or prepared statements for all database operations involving the Authorization header input. Additionally, apply input validation and employ least-privilege database accounts to limit the impact of any successful injection.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2021-30176 — 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-2021-30176 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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