dbcve.org
AllegraApplication · Alltena

CVE-2023-51639

CRITICAL · 9.8 CVSS v3.1 Published 2024-11-22
Fix available
A fix is available. Upgrade to 7.5.1 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
Allegra downloadExportedChart Directory Traversal Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of Allegra. Authentication is not required to exploit this vulnerability. The specific flaw exists within the downloadExportedChart action. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-22361.

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 confidence

The downloadExportedChart function in Allegra lacks proper validation of user-supplied paths, allowing directory traversal attacks. Combined with the authentication bypass, remote unauthenticated attackers can access arbitrary files on the server file system by manipulating path traversal sequences in the input.

MitigationApply vendor patch when available; implement strict input validation and path sanitization on the downloadExportedChart endpoint to ensure user-supplied paths cannot escape intended directories; consider WAF rules as interim measure.

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
AllegraApplication
Affected:< 7.5.1

CVSS 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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify Allegra installation version
    Locate the Allegra installation and retrieve its version number from the application metadata, startup banner, or version file - compare against the affected range of all versions below 7.5.1
    Affected if Installed version is any release prior to 7.5.1
  2. Locate the downloadExportedChart endpoint
    Identify if the downloadExportedChart function is exposed in the Allegra web application - this is typically found in the application's URL routing or API definition
    Affected if The endpoint exists and is routable in the application
  3. Verify unauthenticated access to the endpoint
    Confirm whether the downloadExportedChart endpoint can be accessed without authentication - the CVE indicates an authentication bypass enables unauthenticated access
    Affected if The endpoint accepts requests without requiring valid authentication credentials
  4. Inspect path validation on file download parameters
    Examine how the downloadExportedChart function handles user-supplied path input - check if path traversal sequences like ../ are validated or blocked
    Affected if User-supplied path parameters are accepted without proper sanitization or validation that prevents directory traversal
  5. Test for directory traversal vulnerability
    If the endpoint is accessible without auth, observe whether providing path traversal sequences in the path parameter allows access to files outside the intended export directory - compare behavior against expected secure behavior
    Affected if Path traversal sequences are not blocked and can be used to access arbitrary file system locations

A system is affected if it runs Allegra version below 7.5.1 and exposes the unauthenticated downloadExportedChart endpoint without proper path validation on user-supplied parameters.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 7.5.1 or later
Fixed in 7.5.1
Interim mitigation

Apply vendor patch when available; implement strict input validation and path sanitization on the downloadExportedChart endpoint to ensure user-supplied paths cannot escape intended directories; consider WAF rules as interim measure.

Recommended fix High confidence

7.5.1 or later

  1. 1. Identify the current Allegra installation version by checking the application or configuration files.
  2. 2. Create a full backup of the Allegra database, configuration files, and installation directory.
  3. 3. Download Allegra version 7.5.1 or later from the official vendor website (www.trackplus.com).
  4. 4. Follow the vendor's documented upgrade procedure to install the fixed version.
  5. 5. After upgrade, verify that the downloadExportedChart endpoint now properly validates paths and rejects directory traversal attempts.
  6. 6. Test that legitimate chart export functionality still works correctly after the upgrade.

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Allegra Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-51639 in production — separate from our analysis above.

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What this is

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.

What belongs here
  • 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