CVE-2023-51638Network attack vector

Authentication bypass via shared database password

Published Nov 22, 2024 · Updated Nov 25, 2024

Hard-coded credentials in Alltena Allegra 7.5.0.24 allow remote attackers to bypass database authentication with a shared default password. Every on-premises installation uses the same default database password, and deployments that retain it accept credentials known across installations. No authentication is required; successful access bypasses database authentication, while cloud instances and installations with changed database passwords are not exposed.

CVSS severity9.8
Critical
EPSS probability1.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in Alltena Allegra 7.5.0.24 allow remote attackers to bypass database authentication with a shared default password. Every on-premises installation uses the same default database password, and deployments that retain it accept credentials known across installations. No authentication is required; successful access bypasses database authentication, while cloud instances and installations with changed database passwords are not exposed.

The record

CVE
CVE-2023-51638
Published
Nov 22, 2024
Updated
Nov 25, 2024
Vendor
Alltena GmbH
Product
Allegra
Classifications
CWE-798, T1078.001
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=7.5.0.24
  2. Affected versionversion=7.5.0build29

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Alltena GmbH · Allegraversion=7.5.0.24; version=7.5.0build29

Published CVSS scores

9.8Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/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-798Use of Hard-coded Credentials
T1078.001Default Accounts

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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