CVE-2023-6427
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 has been discovered in BigProf Online Invoicing System 2.6, which does not sufficiently encode user-controlled input, resulting in persistent XSS through /invoicing/app/invoices_view.php, in the FirstRecord parameter. Exploitation of this vulnerability could allow an attacking user to store dangerous JavaScript payloads on the system that will be triggered when the page loads.
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 confidenceBigProf Online Invoicing System 2.6 contains a stored Cross-Site Scripting (XSS) vulnerability in /invoicing/app/invoices_view.php via the FirstRecord parameter. User-supplied input is not properly encoded before being stored and rendered in the page, allowing malicious JavaScript to persist and execute when other users load the invoices_view.php page.
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= 2.6CVSS 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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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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Verify the BigProf Online Invoicing System versionLocate the version identifier in the application installation, typically found in a version file, about page, or the main application header. Common locations include a version.php file, footer, or admin dashboard.Affected if The installed version is exactly 2.6 (version 2.6 specifically listed as affected)
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Confirm invoices_view.php exists in the invoicing moduleCheck for the presence of the file at /invoicing/app/invoices_view.php in the web root directory.Affected if The file exists and is accessible via the web application
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Inspect how the FirstRecord parameter is handled in invoices_view.phpExamine the source code of invoices_view.php to locate where the FirstRecord parameter is processed and output. Look for whether the parameter value is directly echoed or inserted into HTML without encoding functions such as htmlspecialchars() or equivalent.Affected if The FirstRecord parameter value is rendered in the page output without proper HTML encoding
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Check for stored malicious input in the application databaseQuery the application database (if access is available) for any records in tables related to invoices_view that contain suspicious JavaScript tags or HTML in fields that correspond to the FirstRecord parameter.Affected if Stored input containing script tags or event handlers is found in the database
A user is affected if they are running BigProf Online Invoicing System version 2.6 and the invoices_view.php file processes the FirstRecord parameter without output encoding.
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 output encoding/HTML escaping for the FirstRecord parameter in invoices_view.php before rendering, and add input validation to reject or sanitize potentially dangerous characters.
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2023-6427 — 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-2023-6427 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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