CVE-2021-4230
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 · uneditedA vulnerability has been found in Airfield Online and classified as problematic. This vulnerability affects the path /backups/ of the MySQL backup handler. An attacker is able to get access to sensitive data without proper authentication. It is recommended to the change the configuration settings.
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 confidenceThis is an authentication bypass vulnerability in Airfield Online's MySQL backup handler at the /backups/ path. An unauthenticated remote attacker can directly access the backup directory and retrieve sensitive database contents including potentially user credentials and application data.
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 Airfield Online is deployedCheck for the presence of the Airfield Online application in your environment. Look for web application fingerprints, installed packages, or running services associated with this product.Affected if Airfield Online is present in the environment
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Verify the /backups/ endpoint existsAttempt to access the /backups/ path on the web server hosting the application. This can be done via HTTP request (e.g., curl http://target/backups/ or accessing via browser).Affected if The /backups/ endpoint returns a response rather than a 404 or access denied error
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Check for unauthenticated access to backup directoryConfirm whether the /backups/ directory is accessible without any authentication credentials. Attempt to list or retrieve files from this directory without providing login credentials.Affected if The backup directory can be accessed and its contents listed without authentication
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Inspect backup files for sensitive dataIf the directory is accessible, examine any MySQL backup files present. Look for files containing database dumps, SQL scripts, or compressed archives of the database.Affected if Backup files containing database contents are present and retrievable without authentication
If the /backups/ endpoint is accessible without authentication and contains database backup files, the environment is affected by this CVE.
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 proper authentication and authorization controls on the /backups/ endpoint, move backup files outside the web root directory, and ensure the backup handler rejects unauthenticated requests.
- Consultation3.0 h
- Implementation8.0 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 $4,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-4230 — 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-2021-4230 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
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