CVE-2023-1561
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, which was classified as critical, was found in code-projects Simple Online Hotel Reservation System 1.0. Affected is an unknown function of the file add_room.php. The manipulation leads to unrestricted upload. It is possible to launch the attack remotely. VDB-223554 is the identifier assigned to this vulnerability.
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 confidenceAn unrestricted file upload vulnerability exists in the add_room.php file of Simple Online Hotel Reservation System 1.0, allowing remote attackers to upload arbitrary files to the server without proper validation of file types, extensions, or content.
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= 1.0CVSS 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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Confirm the hotel reservation system is installedSearch the web root for files containing 'hotel reservation', 'Fabian', or typical PHP files like index.php, and check for version identifiers in readme, version, or about files.Affected if The system is present and version 1.0 is found or cannot be confirmed as a later version.
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Locate the add_room.php fileSearch the application directory tree for add_room.php, typically found in an admin or room management folder.Affected if The add_room.php file exists on the server.
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Inspect add_room.php for file upload handlingOpen add_room.php and search for upload-related code sections, specifically looking for $_FILES usage and any file validation logic.Affected if The file handles uploads via $_FILES but lacks extension/ MIME type validation, or validation logic is commented out or missing.
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Check for proper file type validationIn add_room.php, look for arrays or lists defining allowed extensions (such as jpg, png) or MIME types, and verify they are actively used in a conditional check before processing uploads.Affected if No whitelist of allowed extensions/MIME types is present, or no validation function is called on the uploaded file.
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Verify upload directory is protectedCheck if uploaded files are stored outside the web root or if files are renamed with randomized filenames to prevent direct execution.Affected if Uploaded files are stored within the web-accessible directory with their original filename, allowing direct execution of uploaded scripts.
Your environment is affected if Simple Online Hotel Reservation System version 1.0 is installed and add_room.php permits unrestricted file uploads without validating extensions, MIME types, or storing files securely.
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 strict file upload validation in add_room.php including whitelist of allowed extensions/MIME types, file content inspection, and storing uploads outside web root or with randomized filenames to prevent execution.
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,664.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-1561 — 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-2023-1561 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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