CVE-2023-40766
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 in PHPJabbers Ticket Support Script v3.2. 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 · moderate confidenceThe vulnerability allows unauthenticated attackers to enumerate valid user accounts through the password recovery function. By submitting different usernames and analyzing the distinct error responses (e.g., 'user not found' vs 'password reset sent'), attackers can identify which accounts exist in the system. This information enables targeted brute force attacks on valid user credentials.
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= 3.2CVSS 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 if Phpjabbers Ticket Support Script is installedLocate the web application files on the server or access the website login page (typically at /index.php or /login.php paths)Affected if The application is present and running
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Verify the installed version is 3.2Check the software version in the admin panel, footer of the page, a VERSION file in the installation directory, or the config.php fileAffected if The version is exactly 3.2 (this specific version is affected)
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Locate the password recovery functionAccess the password recovery or 'Forgot Password' page in the login area of the applicationAffected if The password recovery functionality is accessible without authentication
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Test enumeration with a non-existent usernameSubmit a form with a username or email that does not exist in the system and record the exact error message or response behaviorAffected if A specific error message indicating 'user not found' or similar is returned
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Test enumeration with a valid usernameSubmit the form with a known valid username or email address and compare the response to the previous testAffected if A different response is returned (such as 'password reset sent' or 'email sent') compared to the invalid user test
If the password recovery function returns distinct messages for valid versus invalid accounts, the system is vulnerable to user enumeration via CVE-2023-40766
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 · scopedImplement uniform error messages for all password recovery submissions regardless of account existence, combined with rate limiting and account lockout policies to prevent automated enumeration attempts.
Latest version of Ticket Support Script available from PHPJabbers (contact vendor for version number containing the security fix)
- Contact PHPJabbers support or visit www.phpjabbers.com to request the security update for version 3.2 that addresses CVE-2023-40766
- Obtain the latest stable version of Ticket Support Script from the vendor
- Before upgrading, perform a full backup of the current installation including database and configuration files
- Test the new version in a staging environment to verify the password recovery flow no longer reveals user validity through message differences
- Deploy the updated version to production
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 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 $1,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-40766 — 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-2023-40766 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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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