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AllegraApplication · Alltena

CVE-2023-51641

MEDIUM · 6.3 CVSS v3.1 Published 2024-11-22
Fix available
A fix is available. Upgrade to 7.5.1 or later.
See remediation →
69/100
Remediation priority · Elevated
Remotely reachable 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 renderFieldMatch Deserialization of Unstrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Allegra. Although authentication is required to exploit this vulnerability, product implements a registration mechanism that can be used to create a user with a sufficient privilege level. The specific flaw exists within the renderFieldMatch method. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of LOCAL SERVICE. Was ZDI-CAN-22505.

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

Allegra contains a deserialization vulnerability in the renderFieldMatch method where user-supplied data is not properly validated before being deserialized. This allows authenticated attackers to execute arbitrary code in the context of the LOCAL SERVICE account. The presence of a self-registration mechanism that can create users with sufficient privileges lowers the exploitation barrier.

MitigationApply vendor-provided patches for CVE-2023-51641; if no patch is available, disable the registration mechanism and review the renderFieldMatch method for unsafe deserialization patterns.

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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. Check the installed Allegra version
    Locate the Allegra installation and identify its version number, then compare it to the affected range (all versions prior to 7.5.1)
    Affected if The installed version is any release before 7.5.1
  2. Determine if self-registration is enabled
    Inspect the Allegra user management or authentication settings to see if new user self-registration is permitted
    Affected if Self-registration is enabled and allows creation of new user accounts
  3. Verify if users with elevated privileges exist
    Review the user account list and their permission levels to identify accounts with sufficient privileges for exploitation
    Affected if Any authenticated user account exists in the system with privileges that could be leveraged
  4. Confirm the renderFieldMatch method is accessible
    Determine whether the renderFieldMatch method is exposed via web interface, API, or other network-accessible service
    Affected if The renderFieldMatch method is reachable by authenticated users through any interface

A system is affected if it runs Allegra versions before 7.5.1, has the self-registration feature enabled, and contains at least one authenticated user with access to the renderFieldMatch method.

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-provided patches for CVE-2023-51641; if no patch is available, disable the registration mechanism and review the renderFieldMatch method for unsafe deserialization patterns.

Recommended fix High confidence

Allegra 7.5.1

  1. 1. Download Allegra version 7.5.1 or later from the official vendor website (www.trackplus.com)
  2. 2. Back up your current Allegra installation and database before proceeding with the upgrade
  3. 3. Stop the Allegra service to ensure a clean upgrade process
  4. 4. Install the updated Allegra 7.5.1 version following the vendor's standard upgrade documentation
  5. 5. Restart the Allegra service after installation completes
  6. 6. Verify the application is functioning correctly and the renderFieldMatch method is updated
Caveat Review vendor release notes for any configuration or feature changes between your current version and 7.5.1

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

Fix this in Allegra Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,930
Get the upgrade done

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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-2023-51641 in production — separate from our analysis above.

No notes yet

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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