CVE-2023-51641Network attack vector

Remote code execution via unsafe renderFieldMatch deserialization

Published Nov 22, 2024 · Updated Nov 25, 2024

Deserialization in Alltena GmbH Allegra 7.5.0 build 29 allows remote attackers to execute arbitrary code through renderFieldMatch. The method deserializes user-supplied data without adequate validation, allowing attacker-controlled objects to trigger code execution. Exploitation requires an authenticated account, but open registration supplies sufficient privileges, and resulting code runs as LOCAL SERVICE.

CVSS severity9.8
Critical
EPSS probability1.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in Alltena GmbH Allegra 7.5.0 build 29 allows remote attackers to execute arbitrary code through renderFieldMatch. The method deserializes user-supplied data without adequate validation, allowing attacker-controlled objects to trigger code execution. Exploitation requires an authenticated account, but open registration supplies sufficient privileges, and resulting code runs as LOCAL SERVICE.

The record

CVE
CVE-2023-51641
Published
Nov 22, 2024
Updated
Nov 25, 2024
Vendor
Alltena GmbH
Product
Allegra
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.5.0build29
  2. Affected versionversion=7.5.0 build 29

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Alltena GmbH · Allegraversion=7.5.0build29; version=7.5.0 build 29

Published CVSS scores

6.3NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
9.8Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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