CVE-2021-47728
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 · uneditedSelea Targa IP OCR-ANPR Camera contains an unauthenticated command injection vulnerability in utils.php that allows remote attackers to execute arbitrary shell commands. Attackers can exploit the 'addr' and 'port' parameters to inject commands and gain www-data user access through chained local file inclusion techniques.
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 confidenceUnauthenticated command injection vulnerability in utils.php of Selea Targa IP OCR-ANPR cameras allows remote attackers to execute arbitrary shell commands via the 'addr' and 'port' parameters. The vulnerability can be chained with local file inclusion techniques to achieve www-data user access.
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 versionsall versionsall versionsall versionsall versionsall versionsall versionsall 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
- 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 Selea camera models on the networkScan your network for devices with vendor-specific HTTP banners or use network discovery to identify devices matching: Selea Izero Box, Izero Column Entry/8, Izero Column Full/8, Targa 504, Targa 512, Targa 704 Ilb, Targa 704 Tkm, or Targa 710 Inox. Check device web interface title pages or HTTP response headers for 'Selea' branding.Affected if Any Selea camera model from the affected product list is found on the network.
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Confirm camera firmware versionAccess the camera web interface and navigate to the system info or about page to retrieve the firmware version. Compare against the list: Izero Box Full, Izero Column Entry/8, Izero Column Full/8, Targa 504, Targa 512, Targa 704 Ilb, Targa 704 Tkm, Targa 710 Inox.Affected if The installed firmware corresponds to any of the listed affected product families.
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Check if web management interface is network-exposedDetermine if the camera HTTP/HTTPS ports (typically 80/443) are reachable from untrusted network segments or the public internet. Review firewall rules, ACLs, and NAT configurations for the camera IP addresses.Affected if The camera web interface is accessible from networks outside the trusted management zone.
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Test for unauthenticated access to utils.phpSend an HTTP GET request to /utils.php?addr=test&port=80 without providing any authentication credentials. A response (even an error) indicates the endpoint is accessible without authentication.Affected if The utils.php script responds to unauthenticated requests.
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Verify command injection is possibleSend a crafted request to utils.php with suspicious input in the 'addr' or 'port' parameters, such as 'addr=;id' or 'port=80;id'. Check if the response contains command output that should not be present in normal operation.Affected if The camera returns output from injected shell commands in the response.
Your environment is affected if you have any Selea Izero or Targa camera models from the listed families with their web interfaces exposed to untrusted networks, and the utils.php endpoint is accessible without authentication.
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 dataApply vendor-supplied firmware patch immediately; if unavailable, restrict network access to the camera management interface to prevent external exploitation.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-47728 — 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-2021-47728 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