CVE-2023-40758
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 PHPJabbers Document Creator v1.0. 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 PHPJabbers Document Creator v1.0 password recovery function allows attackers to distinguish between valid and invalid usernames through differing error messages, facilitating targeted brute force attacks against valid accounts.
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 PHPJabbers Document Creator versionLocate the application version number in the software installation directory, admin panel, or footer of the web interface. Common locations include an 'about' page, a version.php file, or the main dashboard.Affected if The installed version is 1.0 (exact match)
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Locate the password recovery endpointIdentify the password recovery URL in the application, typically found on the login page via a 'Forgot Password' or 'Reset Password' link. Common paths include '/forgot-password', '/index.php?controller=PasswordReset', or similar.Affected if The password recovery functionality is accessible and enabled
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Test error message for a non-existent usernameSubmit a password recovery request using a clearly invalid or random username/email that does not exist in the system. Record the exact error message or response displayed.Affected if An error message is returned indicating the username/email is invalid or does not exist
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Test error message for a valid usernameSubmit a password recovery request using a known valid username or email address that exists in the system. Record the exact error message or response displayed.Affected if A different error message is returned compared to the invalid username test, or the message confirms account existence
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Compare error message responsesDirectly compare the error messages from step 3 and step 4. Check if the messages differ in content, timing, or behavior in a way that reveals whether the username exists in the system.Affected if The password recovery function returns distinguishable messages for valid vs invalid usernames, enabling user enumeration
The environment is affected if PHPJabbers Document Creator v1.0 is installed AND the password recovery function returns different error messages for valid versus invalid usernames, allowing an attacker to enumerate valid accounts.
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 dataReplace user-specific error messages in the password recovery workflow with generic responses that do not reveal account existence, preventing user enumeration.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-40758 — 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-2023-40758 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