CVE-2022-2102
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 · uneditedControls limiting uploads to certain file extensions may be bypassed. This could allow an attacker to intercept the initial file upload page response and modify the associated code. This modified code can be forwarded and used by a script loaded later in the sequence, allowing for arbitrary file upload into a location where PHP scripts may be executed.
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 confidenceFile extension control bypass vulnerability where attackers intercept the initial upload page response and modify the extension validation code. The modified code is then used by subsequent scripts, enabling arbitrary file uploads to locations where PHP can be executed.
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>= 1.23.0, < 1.23.21>= 1.24.0, < 1.24.8>= 1.25.0, < 1.25.3CVSS 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
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 the Sepcos firmware versionAccess the relay web interface or use the administrative console to retrieve the firmware version information. This is typically found in System Information, About, or Status pages.Affected if The firmware version falls within >= 1.23.0 and < 1.23.21, OR >= 1.24.0 and < 1.24.8, OR >= 1.25.0 and < 1.25.3
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Locate the file upload functionalityNavigate through the web interface to identify if a file upload feature exists. Look for pages labeled Upload, File Transfer, Configuration Import, Firmware Update, or similar.Affected if A file upload interface is present and accessible to the attacker
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Verify client-side extension validation is in useInspect the HTML source code and JavaScript files of the upload page. Look for file extension checks performed in client-side scripts rather than server-side.Affected if Extension validation is performed by JavaScript in the browser without server-side verification
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Test for response modification vulnerabilityIntercept the upload page response using a proxy tool, modify the extension validation JavaScript to accept arbitrary extensions, and attempt an upload with a .php file.Affected if The upload succeeds with a .php file when client-side validation is modified, confirming the bypass is possible
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Confirm upload directory permits script executionCheck the configuration of the upload directory to determine if it allows execution of uploaded scripts (e.g., PHP files).Affected if Uploaded files are stored in a directory where PHP execution is permitted
The environment is affected if the Secheron Sepcos firmware version is within any of the three affected ranges AND the file upload feature with client-side extension validation is accessible and permits script execution in the upload 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.
dbcve · scoped1.23.211.24.81.25.3
Implement robust server-side file extension validation that cannot be bypassed through client-side response modification, combined with proper file type checking and upload directory restrictions to prevent PHP execution.
Upgrade to firmware 1.23.21 (if on 1.23.x), 1.24.8 (if on 1.24.x), or 1.25.3 (if on 1.25.x)
- Identify the currently installed Sepcos firmware version branch (1.23.x, 1.24.x, or 1.25.x)
- For firmware 1.23.0 through 1.23.20: upgrade to firmware version 1.23.21
- For firmware 1.24.0 through 1.24.7: upgrade to firmware version 1.24.8
- For firmware 1.25.0 through 1.25.2: upgrade to firmware version 1.25.3
- Verify the upgrade was successful and the file upload restrictions are properly enforced
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-2102 — 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-2022-2102 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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