CVE-2023-40759
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 · uneditedUser enumeration is found in PHP Jabbers Restaurant Booking Script v3.0. This issue occurs during password recovery, where a difference in messages could allow an attacker to determine if the user is valid or not, enabling a brute force attack with valid users.
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 confidenceUser enumeration vulnerability in PHP Jabbers Restaurant Booking Script v3.0's password recovery function. The application returns distinguishable error messages for valid vs invalid usernames/emails, allowing attackers to identify valid user accounts and subsequently launch brute force attacks.
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= 3.0CVSS 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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Verify the installed version matches v3.0Locate the installation directory and check the version file, script header, or admin panel version display. Compare against the affected version: PHP Jabbers Restaurant Booking Script = 3.0Affected if The installed version is exactly 3.0 (not patched or upgraded)
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Locate the password recovery functionAccess the forgot password or password recovery page on the web application. This is typically found at /index.php?controller=pjForgot or similar route under the login areaAffected if The password recovery functionality is accessible and operational on the system
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Test error message for invalid usernameSubmit a password recovery request using a username or email that does not exist in the system. Record the exact error message or response returned by the applicationAffected if A specific error message is returned indicating the username/email does not exist (e.g., 'User not found' or 'Invalid email')
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Test error message for valid username (if known)Submit a password recovery request using a username or email that is confirmed to exist in the system. Record the exact error message or response returnedAffected if The error messages or responses differ between valid and invalid usernames, allowing an attacker to distinguish which accounts exist in the system
Your environment is affected if PHP Jabbers Restaurant Booking Script v3.0 is installed and the password recovery function returns different error messages for valid versus invalid usernames, allowing user enumeration.
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 uniform error messages for both valid and invalid usernames during password recovery, and add rate limiting to prevent automated enumeration and brute force attempts.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 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 $2,560.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-40759 — 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-2023-40759 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